761 research outputs found
FIGURE 89. Jassaalonsoae Conlan, 1990. Adult male, 10.0 in Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus
No full textFIGURE 89. Jassaalonsoae Conlan, 1990. Adult male, 10.0 mm. Puerto Deseado, Santa Cruz, Argentina, 26 October, 1981, G.M. Alonso, coll., A2020.0028 (CMN). Lateral view: gnathopod 2; other views medial. Scale 0.1 mm.Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on page 140, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
Jassa laurieae Conlan & Desiderato & Beermann 2021, n. sp.
No full textJassalaurieae n. sp. ( Table 11, Figs 54, 55) Diagnosis. Male: Mandibular palp: article 2, dorsal margin without a fringe of setae. Maxilla 1: without a seta or setal cluster at the base of the palp article 1. Gnathopod 1: basis, anterolateral margin with a few minute setae along its length; carpus without a single or cluster of short setae at the anterodistal junction of the propodus. Gnathopod 2: basis without a row of long setae along the anterolateral margin (setae minute, << basis width); carpus and propodus, setae on the anterior margin minute (setal length << basis width). Pereopods 5–7: missing. Uropods: missing. Telson: missing. Thumbed male: Antenna 2: large individuals with plumose setae on the flagellum and peduncular article 5. Gnathopod 2: propodus, palmar defining spines not produced on a ledge, absent in large thumbed males (state for small thumbed males unknown). Minor males unknown. Major males, thumb distally rounded and on the proximal half of the propodus. Dactyl expanded close to the junction with the propodus but not centrally toothed. Adult female: Unknown. Description. Male, holotype. Length ~ 4.7 mm. Antenna 1: each article with long filter setae on the posterior margin; accessory flagellum 2 articles, the second minute; flagellum 4 articles, each bearing aesthetascs. Antenna 2: stouter than antenna 1 and overlapped by antenna 1 to 2/3 the length of article 5; distal part of article 4 and full length of article 5 and flagellum bearing plumose setae on the posterior margin in addition to filter setae which are about the same length; flagellum 4 articles, article 1, 50% of flagellum length, article 4, 40% as long as article 3, flagellum articles 2–4 bearing curved spines posterodistally. Mandible: palp articles 2 and 3 without dorsal fringe of setae; raker spines 1 right, 4 left. Maxilla 1: inner plate bearing a few short, fine setae; palp without setae at the base of article 1; article 2 with 1 row of facial setae. Gnathopod 1: coxa produced forward, coxal margins, anterior 175% of dorsal length, ventral margin straight; basis flanged anteriorly, anterior margin without a fringe of long setae (all setae minute), posterior margin without setae; carpus, posterior lobe 45% of anterior margin length, without an anterodistal setal cluster; propodus, palm convex, defined by 3 spines (medial-lateral-medial), these mid-distant along the palm; dactyl facially striated. Gnathopod 2: coxa rounded, coxal margins, anterior 26% and posterior 38% of ventral length, ventral margin convex; gill present; carpus, posterior lobe with a cluster of setae; propodus, anterior margin with only a few minute setae proximally (setae << the width of the basis), palm with a few plumose setae at the dactyl hinge, defined by a long, straight thumb that is rounded at the tip, without palmar defining spines, thumb length 35% of propodus length. Pereopod 3: coxa deepest posteriorly; basis, margins convex; merus, setae 1/2 article width, article width maximally 65% of length; carpus nearly 100% overlapped by the merus; propodus not posteriorly spinose. Pereopod 4: coxa nearly rectangular, deeper than wide, ventrally convex; other articles as for pereopod 3. Pereopods 5–6: missing. Pereopod 7: coxa-ischium missing, distal articles slender, propodus not distally expanded, with small spines only anterodistally at the junction of the dactyl; dactyl, posterior (outer) margin not cusped distally, anterior (inner) margin bearing a seta only at the unguis. Pleopods: missing. Uropods: missing. Telson: missing. Condition. Mouthparts, right antennae 1 and 2, gnathopod 1, left gnathopod 2, and right pereopods 3 and 4 slide mounted. Whole body with left antenna 2 and gnathopod 1, right gnathopod 2 (coxa to merus) and left pereopod 4 in 70% ethanol. Missing posterior portion of the body from pereon segment 4 onwards, which had been removed for CO1 analysis. Variation. Maximum body length: male ~ 4.8 mm. Type material examined. Holotype, male, ~ 4.7 mm, from macroalgae at Praia Norte, Viana do Castelo, Portugal (41.6938, -8.85118), Pedro Gomes, collector, 23 September 2010, Specimen ID SFC 29-003, Process ID FCCOM341- 11. Donated by Filipe Costa, University of Minho, Portugal, to the Canadian Museum of Nature (CMN A2019.0061, catalogue no. CMNC 2019-1385). Paratype, male, ~ 4.8 mm, same location, date and collector, Specimen ID SFC 29- 002, Process ID FCCOM340-11 (catalogue no. CMNC 2019-1386). Etymology. Named in honour of artist Susan Laurie-Bourque who skillfully illustrated all the plates for this paper, Conlan (1990; in press), and many earlier taxonomic treatments. Remarks. Jassa laurieae is only known from the holotype and paratype specimens which are both major form adult males. Both specimens had the posterior portions of their body removed for CO1 analysis, with the results published in Lobo et al. (2017). Body length has been estimated based on the expected length of the remaining body using J. kimi as a model, which is similarly sized. The actual body portion available for study was 1.8 mm long for the holotype and 1.2 mm long for the paratype. Lobo et al. (2017) considered J. laurieae to be a Portuguese variant of J. pusilla, but the CO1 analyses revealed that both the holotype and paratype were genetically similar and clearly distinct from North Sea specimens of J. pusilla as well as from Portuguese and North Sea J. falcata, J. herdmani and J. marmorata, and from U.S. J. staudei. Jassa laurieae is only known from the Atlantic coast of Portugal, where it may be found with J. falcata, J. pusilla and J. herdmani (Fig. 9). Morphologically, the major form males of J. laurieae and J. falcata are similar in appearance at the anterior end, with plumose setae on antenna 2, minute setae on the anterior bases of gnathopods 1 and 2, absence of a seta or cluster of setae on the anterodistal margin of the gnathopod 1 carpus at the junction of the propodus, and relatively long thumb with rounded tip. The two differ in that J. laurieae lacks the dorsal fringe of setae on article 2 of the mandibular palp which both J. falcata and J. herdmani consistently possess in both sexes and all ages. Jassa falcata is also distinctive in having 1–2 spines midway along the inner ramus of uropod 3, but the state for J. laurieae is unknown. Large major form J. falcata have a very long thumb which is more squared at the tip than in J. laurieae but there are too few specimens of the latter to determine variation. Jassa laurieae is less similar in appearance to congener J. pusilla than to J. falcata in the major form male, although the females and juveniles may prove to be more similar. Major form males of J. pusilla develop an indent at the tip of the thumb and never have plumose setae on the antenna 2. Both species are similar in lacking the dorsal setal cluster on article 2 of the mandibular palp and lack of a seta or setal cluster on the anterodistal junction of the carpus with the propodus on gnathopod 1. They are also similar in their small body length, while J. falcata achieves a greater length. Until more specimens of J. laurieae are found, these two species are currently only distinguishable by the major form male. Additional distinguishing characters may occur on the posterior region of the body, though. Jassa herdmani bears the distinguishing setal fringe on article 2 of the mandibular palp (any age, both sexes), and this serves to easily separate it from J. laurieae. Major form males of J. herdmani do not bear plumose setae on antenna 2 and achieve greater body size.Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on pages 94-97, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
FIGURE 94. Jassa thurstoni Conlan, 1990. Adult male 1 in Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus
No full textFIGURE 94. Jassa thurstoni Conlan, 1990. Adult male 1, major form, paratype, 6.0 mm, NMCC-1082. Observation Bluff, Outer Islet, Signy Island, South Orkney Islands (60°42ʹ30ʺS, 45°35ʹ10ʺW), 14 September 1965, M. H. Thurston, coll., station 52 (2085), Agassiz trawl over gravel and sand, sand with some rock, algae on rocks, 20 m depth, NHM 1969:763:1. IZ 1989-013 (CMN). Mouthparts. Frontal view: upper lip; lateral view: maxilla 1; other views medial. Scale 0.1 mm.Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on page 146, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
Jassa kimi Conlan & Desiderato & Beermann 2021, n. sp.
No full textJassakimi n. sp. (Table 12, Figs 60–61) Diagnosis. Male: Mandibular palp: article 2, dorsal margin without a fringe of setae. Maxilla 1: without a seta or setal cluster at the base of the palp article 1. Gnathopod 1: basis, anterolateral margin with a few minute setae along its length; carpus with a single short medial seta at the anterodistal junction of the propodus. Gnathopod 2: basis without a row of long setae along the anterolateral margin (setae minute, << basis width); carpus and propodus, setae on the anterior margin minute (setal length << basis width). Pereopods 5–7: propodus not expanded anteriorly. Uropod 1: ventral peduncular spinous process underlying about 1/3 of the longest ramus. Uropod 3: inner ramus without spines mid-dorsally (with only the single apical spine). Telson: tip without apical setae in addition to the usual short setae at each dorsolateral cusp. Thumbed male: Antenna 2: without plumose setae on the flagellum and peduncular article 5. Gnathopod 2: propodus, palmar defining spines not produced on a ledge, minute in large thumbed male (state for small thumbed males unknown). Minor male unknown. Major male, thumb distally rounded with posterior corner more acute than the anterior corner, incised well into the proximal half of the propodus. Dactyl expanded close to the junction with the propodus but not centrally toothed. ......continued on the next page TABLE 12. (Continued) 14 Very large thumbed males may have greatly lengthened second antennae that lack the plumose setae that smaller males possess (Fig. 62) 15 In J. myersi, the setae are sparse, but can be interpreted to be numerous enough to comprise a fringe or not to comprise a fringe. Therefore, in the key to all species, J. myersi has been included twice so that it can be keyed out as either having a fringe or not. Adult female: Unknown. Description. Male, holotype. Length 3.5 mm. Antenna 1: each article with long filter setae on the posterior margin; accessory flagellum 2 articles, the second minute; flagellum 5 articles, the last minute, bearing aesthetascs. Antenna 2: stouter than antenna 1 and overlapped by antenna 1 to 2/3 the length of article 5; without plumose setae on the posterior margin of the peduncle and flagellum; flagellum 3 articles, article 1 65% of flagellum length, article 3, 45% as long as article 3, flagellum articles 2 and 3 bearing curved spines posterodistally. Mandible: palp articles 2 and 3 without dorsal fringe of setae; raker spines 2 right, 3 left. Maxilla 1: palp without setae at the base of article 1, article 2 with 1 row of facial setae; inner plate without setae apparent. Gnathopod 1: coxa produced forward and creased laterally, coxal margins, anterior 60% of dorsal length, ventral margin straight; basis flanged anteriorly, anterior margin without a fringe of long setae (all setae minute), posterior margin without setae; carpus, posterior lobe 40% of anterior margin length, with a single short medial seta at the anterodistal margin; propodus, palm shallowly concave, defined by 2 medial spines, these mid-distant along the palm; dactyl not facially striated. Gnathopod 2: coxa rectangular, coxal margins, anterior 50% and posterior 40% of ventral length, ventral margin slightly wavy; gill present; carpus, posterior lobe without a cluster of setae; propodus, anterior margin without setae proximally, palm with a few plumose setae at the dactyl hinge, defined by a long, slightly sinuous thumb that is rounded at the anterior tip and more squared at the posterior tip, with 1 short palmar defining spine, thumb length 37% of propodus length. Pereopod 3: coxa deepest posteriorly; basis, margins shallowly convex; merus, central setae 45% of article width, article width maximally 75% of length; carpus nearly 100% overlapped by the merus; propodus not posteriorly spinose. Pereopod 4: coxa nearly square; other articles as for pereopod 3. Pereopod 5–7: distal articles slender, propodus not distally expanded, with small spines only anterodistally at the junction of the dactyl; dactyl, posterior (outer) margin not cusped distally, anterior (inner) margin bearing a seta only at the unguis. Pleopods: with 2 peduncular coupling hooks. Uropod 1: peduncle, posteroventral spinous process underlying 37% of the inner ramus, inner and outer rami with 2 and 4 mid-dorsal spines respectively, not terminating in a fringe of cusps ventral to apical spine group. Uropod 2: peduncle, posteroventral spinous process absent. Uropod 3: outer ramus with 1 larger cusp proximal to the basally immersed, dorsally recurved spine and minute cusps around it; inner ramus without a spine mid-dorsally. Telson: tip without apical setae in addition to the single long seta and pair of short plumose setae at each dorsolateral cusp. Condition. Mouthparts, left antenna 1, right antenna 2, left gnathopod 1, right gnathopod 2, pereopods 3–7, pleopods 1–3 and uropods 1–3, left uropod 3 and telson slide mounted. Right antenna 1 article 1, left antenna 2, right gnathopod 1 coxa-ischium, left gnathopod 2, pereopod 5, pleopods and uropods 1 and 2 with the whole body. Missing remainder of right antenna 1 and gnathopod 1 and left pereopods 4, 6 and 7. Type material examined. Holotype, male, 3.5 mm, from a light trap at 4–6 m depth near a breakwater at Impo Port, Yeosu-Si, The Republic of Korea, 34°35′47″N, 127°48′17″E, S.-S. Hong, collector, 23 June 2011. catalogue number: MARBK-115; deposit institution: Marine Amphipoda Resources Bank of Korea (MARBK), Cheonan, South Korea. Etymology. Named in honour of Young-Hyo Kim, who has considerably expanded our knowledge of the biodiversity of Korean amphipods. Remarks. Numerous combinations of non-sexually dimorphic characters serve to distinguish J. kimi from all other species of Jassa. Jassa kimi lacks the fringe of setae on the anterior margin of the gnathopod 2 basis which is distinctive in numerous North Pacific species of Jassa (J. borowskyae, J. carltoni, J. oclairi, J. staudei, J. marmorata, J. slatteryi, and J. morinoi). From the other North Pacific species that also lack this fringe (J. myersi and J. shawi), it can be distinguished by having only a very short seta on the carpus of gnathopod 1 at the anterodistal junction of the propodus (long seta in J. myersi but short in J. shawi). From J. shawi it can be distinguished by the length of the peduncular process underlying the rami of uropod 1. In J. kimi, this process is about one third the length of the longer inner ramus, which is typical of most species of Jassa. In J. shawi, this process is extremely short, appearing absent unless viewed microscopically. When compared with Northern Hemisphere species that are restricted to the Atlantic and adjoining seas (J. falcata, J. herdmani, J. laurieae, J. monodon and J. pusilla), the absence of a setal fringe on gnathopod 2 can be readily used as a distinguishing character as all lack this fringe. These species bear other character states that are not shared with J. kimi. Jassa falcata and J. herdmani possess an extra fringe of setae on the second article of the mandibular palp which is directed dorsally, which J. kimi does not possess. Jassa monodon has a distinctive cluster of setae at the apex of the telson, which J. kimi lacks. Jassa laurieae and J. pusilla lack the carpal seta on gnathopod 1 that J. kimi possesses. The male dimorphism also differs. Jassa kimi does not bear plumose setae on antenna 2 while J. laurieae does. The thumb shape of the major male distinguishes J. kimi from J. pusilla: very long and slightly sinous in J. kimi with a squared end, while in J. pusilla the thumb is shorter and the tip incised. For Southern Hemisphere species, the fringe of spine-like setae along the anterior margin of the basis of gnathopod 1, long carpal seta(e) on gnathopod 1 and/or the prehensile pereopods 5–7 will separate J. kimi from J. alonsoae, J. fenwicki, J. hartmannae, J. ingens, J. justi, J. kjetilanna and J. thurstoni. That leaves J. gruneri, which is less easy to compare as the thumbed male is unknown for J. gruneri but known for J. kimi and the female and juvenile are known for J. gruneri but unknown for J. kimi. When the female and juvenile male of J. kimi are found, it is likely that the palm of the gnathopod 2 will be concave, which is a characteristic of most Northern Hemisphere species of Jassa, while females and juvenile males of Southern Hemisphere species typically have sinuous palms (as does J. gruneri). Other characteristics may also distinguish these species: e.g., fewer articles in the antenna 2 flagellum in J. kimi than J. gruneri and generally more slender and elongated mouthparts in J. kimi than J. gruneri.Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on pages 102-108, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
Jassa californicus
No full textJassa californicus (Boeck, 1871) The Norwegian scientist Axel Boeck (1871) described seven new species from a collection made in the San Francisco area of California and sent to him for taxonomic assessment and deposition in Norway by a Professor Esmark. One of these was Podocerus californicus, based on two female specimens. Stebbing (1906) recognized this species as Jassa californica. Conlan (1990) noted that the whereabouts of the type specimens was unknown. As a further effort to locate these specimens, The Natural History Museum, Oslo, Norway, which is the repository for Boeck’s collection, was contacted but the reply was, “...we have not any Podocerus californicus Boeck, 1871 in our collection, and Idon’t know where you can find it — if it exists...” (Åse Ingvild Wilhelmsen, 8 June 2018). It is possible that these specimens could have been any of the species indigenous to the California coast but named much later: J. slatteryi (Figs 3–4), J. morinoi (Figs 5–6), J. borowskyae, J. staudei, J. carltoni, J. shawi or J. myersi (Fig. 10). It is possible also that it could have been J. marmorata which would place its introduction to this area much earlier than is currently known.Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on page 160, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
Jassa variegatus
No full textJassa variegatus (Leach, 1814) Stebbing (1899a) compared Leach’s (1814) descriptions of the genera Podocerus and Jassa, collected from Devon, England, demonstrating that the two genera were valid, while previously, it had been thought that the two were the same. This study initiated the transfer of species to each genus, with Podocerus variegatus Leach, 1814 being the type for the genus Podocerus. Conlan (1990) examined the syntypes NHM 295b and 285d of Podocerus variegatus and found them to be indeed in the genus Podocerus. Jassa pulchella Leach, 1814 erected by Leach as the type for the genus Jassa (NHM 296a–g; lectotype: 296e), is now J. falcata (Montagu, 1808) (holotype: NHM 603a). Asecond species of Jassa described by Leach (1814), J. pelagica, was transferred by Stebbing (1899a) to Parajassa. Stebbing (1899a) documented the taxonomic confusion surrounding these three species over the 85 years between Leach’s publication and his own. Conlan (1990) mis-interpreted Stebbing (1899a) in thinking that there werestill specimens of Leach’s type series for P. variegatus that contained Jassa. However, this appears to be not the case, since P. variegatus and P. pelagica had their types validated by Conlan (1990) along with the type species for the genera Podocerus and Jassa. Therefore, the name J. variegatus is invalid (it is actually P. variegatus).Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on page 161, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
Jassa calcaratus
No full textJassa calcaratus (Rathke, 1843) In documenting the fauna of Norway, Rathke (1843) described and figured a new species which he had collected from seaweed at Kristiansund, Norway. Named Podocerus calcaratus, his illustration of the male’s long-thumbed gnathopod 2 indicates that it is probably Jassa falcata. Rathke (1843) indicated that P. calcaratus was close to, but different from P. pulchellus (now Jassa falcata) but did not state why. Bate (1862) disagreed and synonymized P. calcaratus under P. pulchellus (now Jassa falcata). Sars (1894) listed P. calcaratus as a synonym of P. falcatus (now Jassa falcata), saying that “The P. calcaratus of Rathke is undoubtedly the adult male of this species...” One large male specimen, collected at Tromsø, Norway, and identified as Podocerus calcaratus by Danielsen, (not type), was lent by the Zoological Museum, Bergen, Norway (ZMUB 2832) for this study. The vial held a secondary label, Jassa pulchella. This specimen was clearly a major form male J. falcata. Although the whereabouts of the type specimens are unknown, it is clear from Rathke’s (1843) description, illustrations and collection location that his P. calcaratus is indeed J. falcata (Montagu, 1808). Therefore, J. calcaratus is synonymized with J. falcata.Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on page 160, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
FIGURE 45 in Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus
No full textFIGURE 45. Jassa falcata (Montagu, 1808). Variation in thumb length relative to body length in males in a single collection at Audrassalas, Pas-de-Calais, France, 1 July 1985, K. E. Conlan, coll., in tubes and and actively walking over Ceramium rubrum (mainly) and Polysiphonia, even though out of contact with seawater at low tide, IZ 1985-093 (CMN). Arrows refer to the associated gnathopod illustrations. The subadult male had a thumb visible inside the cuticle, indicating that it would molt next into a thumbed adult. Setae omitted except for those around the thumb and spines in order to landmark position changes with growth. All views lateral. Scale 0.1 mm. Linear regression assumptions passed for the adult major form male. Linear regression statistics: Major form, thumb length = -1.219 + 0.281 body length, r2 = 0.773, n = 38. Illustration after Conlan (1990).Published as part of Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, pp. 1-191 in Zootaxa 4939 (1) on page 84, DOI: 10.11646/zootaxa.4939.1.1, http://zenodo.org/record/458062
Master track of HEINCKE cruise HE581 in 1 sec resolution (zipped, 6.8 MB)
No full textRaw data acquired by position sensors on board RV Heincke during expedition HE581 were processed to receive a validated master track which can be used as reference of further expedition data. During HE581 the inertial navigation system IXSEA PHINS III and the GPS receivers Trimble Marine SPS461 and SAAB R5 SUPREME NAV were used as navigation sensors. Data were downloaded from DAVIS SHIP data base (https://dship.awi.de) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report found at EPIC repository https://hdl.handle.net/10013/epic.c576cad6-0344-4ff0-a7bb-da789260c7c5. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track
Master track of HEINCKE cruise HE562 in 1 sec resolution (zipped, 8.0 MB)
No full textRaw data acquired by position sensors on board RV Heincke during expedition HE562 were processed to receive a validated master track which can be used as reference of further expedition data. Position sensors used during HE562 were the internal navigation system IXSEA PHINS III and the GPS receivers Trimble Marine SPS461 and SAAB R5 SUPREME NAV. Data were downloaded from DAVIS SHIP data base (https://dship.awi.de) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report found at EPIC repository hdl:10013/epic.7fb76fae-9928-4d69-aea6-a12856504ca7. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track
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