56 research outputs found
Rivulus berovidesi, a new killifish species (Teleostei: Rivulidae) from western Cuba
No full textSilva, Rodet Rodriguez (2015): Rivulus berovidesi, a new killifish species (Teleostei: Rivulidae) from western Cuba. Zootaxa 3949 (2): 289-296, DOI: 10.11646/zootaxa.3949.2.
Limia mandibularis, a new livebearing fish (Cyprinodontiformes: Poeciliidae) from Lake Miragoane, Haiti
No full textRodriguez-Silva, Rodet, Torres-Pineda, Patricia, Josaphat, James (2020): Limia mandibularis, a new livebearing fish (Cyprinodontiformes: Poeciliidae) from Lake Miragoane, Haiti. Zootaxa 4768 (3): 395-404, DOI: 10.11646/zootaxa.4768.3.
FIGURE 3 in Limia mandibularis, a new livebearing fish (Cyprinodontiformes: Poeciliidae) from Lake Miragoane, Haiti
No full textFIGURE 3. Mouth of a cleared specimen of Limia mandibularis sp. nov. (OMNH 86831, female, 41.5 mm SL) showing the peculiar arrangement of bones of the upper and lower jaws. Premax: premaxillar, max: maxilla, dent: dentary, ang: anguloarticular, qu: quadratePublished as part of Rodriguez-Silva, Rodet, Torres-Pineda, Patricia & Josaphat, James, 2020, Limia mandibularis, a new livebearing fish (Cyprinodontiformes: Poeciliidae) from Lake Miragoane, Haiti, pp. 395-404 in Zootaxa 4768 (3) on page 398, DOI: 10.11646/zootaxa.4768.3.6, http://zenodo.org/record/378408
Limia mandibularis Rodriguez-Silva & Torres-Pineda & Josaphat 2020, sp. nov.
No full textLimia mandibularis, sp. nov. (Figs. 2-6, Tables 1 and 2) Holotype. OMNH 86828, adult male 35.5 mm SL (Fig. 2), Lake Miragoane, Haiti; coordinates 18°25’33.2” N, 73°02’56.9”W; R. Rodriguez-Silva, P. Torres-Pineda, J. Josaphat, and P. Michard Beaujour, June 5, 2019 Paratypes. Same origin, date and collectors as holotype. OMNH 86829, 1 female, 41.0 mm SL (Fig. 2); OMNH 86831, 1 male, 38.5 mm SL and 1 female, 41.5 mm SL (cleared and stained specimens); OMNH 86832, lot of 5 females, 36.0- 41.5 mm SL; MNHNSD.22.10426, 1 female, 39.5 mm SL; MNHNSD.22.10427, 1 female, 33.0 mm SL: MNHNSD.22.10428, 1 female, 33.0 mm SL. Diagnosis. Limia mandibularis sp. nov. is uniquely diagnosed by the presence of a well-developed lower jaw due to the presence of an elongate anguloarticular bone (Fig. 3). The new species can also be identified by the lack of preorbital and preopercular pores and by the presence of single preorbital and preopercular canals forming open grooves (Fig. 4). Limia mandibularis sp. nov. can be further distinguished by the combination of the following characters: dorsal fin with 8 rays and its origin is slightly behind of the origin of the anal fin in females; 13 predorsal scales; caudal fin symmetrical and truncate or slightly convex; no crossbars, spots or blotches on body in both sexes. See additional comments in the Discussion below. Description. Elongate body with deep caudal peduncle. Post-anal region moderately compressed towards caudal peduncle. Dorsal profile slightly concave from snout tip to posterior edge of eye; convex from middle of eye to origin of dorsal fin; slightly concave or straight from dorsal fin origin to caudal fin. Ventral profile convex with distinctive protuberance in the lower jaw area that is formed by the joint of anguloarticular and quadrate bones (quadrato-mandibular joint). Post-anal profile slightly concave or straight (Fig. 2). Gonopodial segments of ray 4p serrae 11 (Fig. 5). Predorsal scales 12 to 13 (usually 13) and lateral scales 26 to 28 (usually 26). Dorsal fin with 8 rays (Table 1). Caudal fin with 15 to 17 rays (usually 16), truncate or slightly convex, and symmetrical in both sexes. Mouth wide and superiorly oriented. Teeth of outer row conical in upper and lower jaws. Vertebral column with 30 vertebrae. Color of preserved specimens. Dorsal and middle portion of body dark, with noticeable reticulated pattern due to black pigmentation on edges of scales. Ventral region of body and scales of the hypural area with tannish coloration, much darker below pectoral fins. All fins hyaline (Fig. 2). Color in live specimens. Yellowish background towards dorsal region of body, darker in snout and above opercula. Ventral region with silver coloration. No distinctive features like spots, bars or blotches on body or fins in both sexes (Fig. 6). Distribution and ecological notes. Limia mandibularis sp. nov. is only known from the north bight of Lake Miragoane in Haiti. The lake seems very isolated in terms of connectivity with other water bodies as we did not see any tributary river or stream, but only mountain springs that lead to the lake. Our observations agree with the classification of Curtis & Hodell (1993) of the lake as an endorheic drainage. The species herein described was collected in a clear water path with slow current exiting the lake. Water temperature was 29.9 °C and water conductivity was 321 microS/cm on the collecting date (June 5 th, 2019). The area is characterized by the presence of muddy bottoms and some semi-submerged and submerged vegetation growing near the banks (Fig. 7). Limia mandibularis was sympatric with Gambusia beebei, five other Limia species (L. miragoanensis, L. immaculata, L. nigrofasciata , L. garnieri and L. islai), Nandopsis haitiensis and two species of African cichlids introduced in the lake (Oreochromis aureus and Tilapia sp.). Etymology. The specific epithet mandibularis, from the Latin mandibula (jaw), is in reference to the well-developed lower jaw, a character that distinguishes the species. The vernacular name “Jawed Limia ” is proposed for this species, due to the distinct protuberance that can be seen in the lower jaw.Published as part of Rodriguez-Silva, Rodet, Torres-Pineda, Patricia & Josaphat, James, 2020, Limia mandibularis, a new livebearing fish (Cyprinodontiformes: Poeciliidae) from Lake Miragoane, Haiti, pp. 395-404 in Zootaxa 4768 (3) on pages 397-401, DOI: 10.11646/zootaxa.4768.3.6, http://zenodo.org/record/378408
Rivulus berovidesi Silva, 2015, new species
No full text<i>Rivulus berovidesi</i>, new species <p>(Figs. 2–6)</p> <p> <b>Holotype.</b> CZACC-9.83, adult male, 37.3 mm SL, Sierra de Cajalbana, Pinar del Rio province, Cuba, 220 46’ 31.7’’N, -830 26’ 37.7’’W, 26 February, 2014. R. Rodriguez Silva.</p> <p> <b>Paratypes.</b> All from Sierra de Cajalbana, Pinar del Rio province, Cuba. Same date and collector as holotype. CZACC-9.84, three males, 31.1–34.7 mm SL; CZACC-9.85, three females, 36.3–37.9 mm SL; MFP 18.00570, two males 32.2–32.8 mm SL and two females 33.7–34.3 mm SL; MNHN 1457 one male 31.3 mm SL and two females 31–35.6 mm SL; MZC 171656 and 171657 two males 32.7–37.9 mm SL respectively and MZC 171658 and 171659 two females 31.4–33.5 mm SL respectively.</p> <p> <b>Diagnosis.</b> Both males and females of <i>Rivulus berovidesi</i> sp.n. are readily distinguished from <i>Rivulus cylindraceus</i> by the presence of a dark lateral band situated longitudinally along the lateral line, extended from the posterior margin of the eye to the base of the caudal fin (versus a lack of this dark lateral band in <i>Rivulus cylindraceus</i>). Dorsal fin slightly shifted to the caudal peduncle in relation to the origin of anal fin (1–3 mm) when compared to <i>Rivulus cylindraceus</i>. Frontal scalation pattern in <i>Rivulus berovidesi</i> <b>sp. n.</b> is <i>d</i> - type versus <i>e</i> - type pattern in <i>Rivulus cylindraceus</i> (Fig. 2)</p> <p> <b>Description.</b> Morphometric and meristic data for holotype and 22 paratypes are presented in Tables 1 and 2. Largest examined male 37.9 mm SL; largest examined female 38.0 mm SL. Body subcylindrical anteriorly and compressed posteriorly. Dorsal profile slightly convex from the snout to the posterior base of dorsal fin. Ventral profile slightly convex from the lower jaw to the anal fin origin. Both paired and impaired fins rounded and without filaments. Dorsal fin origin above base of the 5th or 6th anal fin ray. Pectoral fins inserted behind to the posterior margin of opercles. Pelvic fins are the smallest, reaching anus. Dorsal fin rays 6–9, caudal fin rays 15–19, anal fin rays 8–11, pelvic fin rays 4–6 and pectoral fin rays 11–14.</p> <p> Body and head entirely scaled with cycloid scales. Longitudinal series of scales 34–37, transverse series of scales 9, pre-dorsal scales 21–25. Frontal scalation is <i>d</i> - type pattern. Males of <i>Rivulus berovidesi</i> sp.n. are yellow and orange ventrally, whereas females are less colored. Figure 3 shows sexual dimorphism in this species, which includes differences in color of body and fins as well as females characterized by a distinctive ocellated caudal spot. Females have a diffuse ocellated caudal spot which can extend from the posterior base of the dorsal fin to the upper margin of the caudal fin.</p> <p>Counts Holotype Paratypes (N=23)</p> <p>Pre-dorsal scales 23 21 (4) 22 (4) 23 (6) 24 (6) 25 (3) Lateral scales 37 34 (4) 35 (7) 36 (7) 37 (5) Dorsal rays 7 6 (4) 7 (9) 8 (8) 9 (2) Caudal rays 19 15 (1) 16 (2) 17 (9) 18 (7) 19 (4) Anal rays 10 8 (2) 9 (12) 10 (8) 11 (1) Pelvic rays 5 4 (4) 5 (10) 6 (9)</p> <p>Pectoral rays 11 11 (10) 12 (9) 13 (2) 14 (2)</p> <p> <b>Color in life.</b> Males (Fig. 4): Body coloration is greenish or olive-green dorsally. There is a wide dark lateral band extended from the posterior margin of the eye to the base of the caudal fin. Ventral ground coloration is yellowish with orange spots reaching the anal fin base. An iridescent blue spot is present behind the margin of opercle in both sexes. Males have an iridescent olive- green spot on the opercle too. Dorsal fin is greenish, caudal fin is slightly greenish on its base and more transparent to the edges. Anal fin is spotted in orange in their base and yellow or yellow- green to the ends. Pelvic fins are yellow and pectoral fins are transparent.</p> <p>Females (Fig. 4): Body coloration less striking when compared to males. General body coloration brown, darker dorsally than ventrally. Ventral coloration is paler with some small yellowish spots. There is a narrow dark lateral band extended from the posterior margin of the eye to the base of the caudal. Diffuse ocellated caudal spot present which can extends from the posterior base of dorsal fin to the superior margin of caudal fin and sometimes along the caudal fin base too (Fig. 4 and 5). All fins slightly greenish or transparent.</p> <p> <b>Color in preserved specimens.</b> Preserved specimens with the typical dark lateral band from the posterior margin of the eye to the base of caudal fin in both sexes, although slightly paler than living specimens. Ventral region of the body with a yellowish homogeneous coloration while dorsal region is brownish-gray. Males with a reticulated pattern on scales above lateral dark band (Fig. 6) while females with the diffuse ocellated caudal spot extended from the end of dorsal fin to the superior margin of caudal fin (Fig. 5). All fins with a whitish coloration.</p> <p> <b>Etymology.</b> The specific name of this new species is given in honor to the Professor Vicente Berovides Alvarez, professor at the Faculty of Biology, Universidad de la Habana, Cuba in recognition of his life-long dedication and contribution to train several generations of new researchers in biological sciences.</p> <p> <b>Distribution and habitat.</b> <i>Rivulus berovidesi</i> <b>sp. n.</b> is known only from northwest mountain system in Pinar del Rio province. Particularly, in Sierra de Cajalbana (type locality) and Rio Camarones. Both localities are situated in northwestern Cuba (Fig. 1). This species inhabits small mountain streams with a depth of 30–70 cm approximately and bottom substrate basically composed by stones, sand and dead leaves (Fig. 7). There is not aquatic vegetation in the area. The streams are clear with pH 7.5 and water temperature 24°C. Other freshwater fish collected together with <i>Rivulus berovidesi</i> <b>sp. n.</b> were: <i>Gambusia punctata</i>, <i>Girardinus uninotatus</i>, <i>Girardinus creolus</i>, <i>Girardinus microdactylus</i>, <i>Nandopsis tetracanthus</i>, <i>Agonostomus monticola</i> and <i>Gobiomorus dormitor</i>.</p>Published as part of <i>Silva, Rodet Rodriguez, 2015, Rivulus berovidesi, a new killifish species (Teleostei: Rivulidae) from western Cuba, pp. 289-296 in Zootaxa 3949 (2)</i> on pages 290-294, DOI: 10.11646/zootaxa.3949.2.9, <a href="http://zenodo.org/record/233332">http://zenodo.org/record/233332</a>
Biogeography of the West Indies: A complex scenario for species radiations in terrestrial and aquatic habitats
No full textStudies of the biogeography of the West Indies are numerous but not all taxonomic groups have received the same attention. Many of the contributions to this field have historically focused on terrestrial vertebrates from a perspective closely linked to the classical theory of island biogeography. However, some recent works have questioned whether some of the assumptions of this theory are too simplistic. In this review, we compiled information about the West Indies biogeography based on an extensive and rigorous literature search. While we offer some background of the main hypotheses that explain the origin of the Caribbean biota, our main purpose here is to highlight divergent diversification patterns observed in terrestrial versus aquatic groups of the West Indian biota and also to shed light on the unbalanced number of studies covering the biogeography of these groups of organisms. We use an objective method to compile existing information in the field and produce a rigorous literature review. Our results show that most of the relevant literature in the field is related to the study of terrestrial organisms (mainly vertebrates) and only a small portion covers aquatic groups. Specifically, livebearing fishes show interesting deviations from the species‐area relationship predicted by classical island biogeography theory. We found that species richness on the Greater Antilles is positively correlated with island size but also with the presence of elevations showing that not only island area but also mountainous relief may be an important factor determining the number of freshwater species in the Greater Antilles. Our findings shed light on mechanisms that may differently drive speciation in aquatic versus terrestrial environments suggesting that ecological opportunity could outweigh the importance of island size in speciation. Investigations into freshwater fishes of the West Indies offer a promising avenue for understanding origins and subsequent diversification of the Caribbean biota.We would like to thank to Caribaea Initiative and National Geography Society (WW‐054R‐17) for providing funding for this project. Open Access fees paid for in whole or in part by the University of Oklahoma Libraries.Ye
Ecological drivers of species radiations in the genus Limia (Teleostei, Poeciliidae) in the West Indies
No full textThe archipelagoes of the West Indies in the Caribbean represent geographically composite regions that provide ideal settings to study the evolution of a very distinctive biota. The combination of complex geological events and tropical climatic conditions has driven radiation processes that are not homogeneous for all groups in the Caribbean. In the course of my dissertation work, I examined the case of livebearing fishes of the genus Limia (Teleostei: Poeciliidae) that show some deviations from the positive species‐area relationship predicted by the theory of island biogeography. I particularly analyzed the potential role of some ecological drivers in explaining the lopsided distribution of Limia fishes in the Greater Antilles. Chapter one is an extensive review about the West Indian biogeography that highlights divergent diversification patterns observed in terrestrial versus aquatic groups. This review also sheds light on the unbalanced number of studies covering the biogeography of these groups of organisms in the West Indies. Chapter two is an assessment of the variation of tolerance to extreme temperatures (measured as critical thermal minimum (CTmin) and maximum (CTmax)) and also the thermal breadth for multiple species of Limia occurring in the West Indies and that occupy different altitudinal distributions. This study analyzes the role of temperature gradients across elevations in determining species distribution in the genus. Chapter three evaluates the diet and feeding specializations of Limia through a comparative analysis based on data of the gut content of eight species. This chapter explores the potential role of the feeding ecology in the radiation of the genus Limia in the Caribbean. Finally, chapter four uses laboratory experiments and also fieldwork data to test whether sexual selection or natural selection may explain the presence of color polymorphism in Limia vittata, an endemic species to Cuba.
Overall, my results show that species richness in the genus Limia is positively correlated with island size but also with the presence of elevations showing that not only island area but also mountainous relief may be an important factor determining the number of freshwater species in the Greater Antilles. In addition, we found no association between thermal tolerance and the altitudinal distribution in Limia species, suggesting that biotic factors such as species interactions, diet specializations, and others should be taken into account when interpreting current distribution patterns. Even though our study showed that the majority of Limia species tend to be feeding generalists, some degree of diet specialization occurs in certain species from Hispaniola where the diversity of the genus Limia is remarkably higher compared to the rest of the Greater Antilles. Lastly, we revealed that natural selection determined by habitat variation in terms of salinity levels, is the most important factor in maintaining color polymorphism in L. vittata. Salinity levels could be indirectly responsible for maintaining different color morphs in this species, likely due to the regulatory effect of saline gradients on predation regimes
Audio Engineering Society Convention Paper Presented at the 120th Convention
No full textThis convention paper has been reproduced from the author's advance manuscript, without editing, corrections, or consideration by the Review Board. The AES takes no responsibility for the contents. Additional papers may be obtained by sending reques
Nuevos registros de distribución de Gambusia rhizophorae (Teleostei: Poeciliidae) en el archipiélago cubano
No full textEl complejo de especies Gambusia punctata está representado en Cuba por dos especies: G. punctata Poey, 1854, endémica de Cuba y G. rhizophorae Rivas, 1969, la que ha sido reportada en los cayos de Florida, en el sur Estados Unidos, y la costa norte del occidente de Cuba. En el presente trabajo se reportan nuevos sitios de distribución de G. rhizophorae a lo largo del archipiélago cubano, tanto en la costa norte como en la costa sur. Se dan a conocer, además, los valores de salinidad de los cuerpos de agua donde habita la especie
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