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Brazil: reaching out, holding hands
Full text linkThe President of the Association of Indigenous Communities of the Middle Negro River (ACIMRN), Sandra Gomes, speaks about the challenges indigenous communities face due to the COVID-19 pandemic. The Negro River in the Amazon region is the largest black water river in the world. Its basin area of approximately 750,000 sq. km accounts for seven percent of the total area of the Amazon basin, and its length from pre-Andean Colombia to its mouth, is approximately 1,700 km, making it the Amazon’s largest tributary
Profile: adding value to fish: Lovin Kobusingye is not just a successful woman entrepreneur in Uganda but an influential voice in shaping pan-African fisheries policies
Full text linkLovin Kobusingye is a well-known young woman fish entrepreneur working in Central Uganda’s Wakiso District. For over eight years, she, along with her two partners and over a thousand other fish farmers, has worked on fish processing and value addition. At the same time, she has persistently lobbied the government to support women-led entrepreneurship through an enabling policy framework designed to protect women in fisheries activities both in Uganda and, at a higher level, throughout Africa
Estimation of Post-Harvest Losses of Fish Transported Using Ice-chilled Carrier Boats from High Seas Pocket 1
Full text linkAccess of Philippine traditional fresh/ice-chilled seining vessels to High Seas Pocket 1 (HSP-1) lessens fishing pressures in the Philippine Exclusive Economic Zone where juvenile oceanic tunas are more likely to be found. However, catch landed by carrier boats from HSP-1 were observed to be of reduced quality, thus eliciting lower market value. The present study was conducted to evaluate the efficiency of icechilled carrier boats by generating data on the magnitude of post-harvest losses incurred in landed catch from HSP-1. Exploratory Fish Loss Assessment Method and Questionnaire Loss Assessment Method were used to estimate quality losses. Landed catch of ice-chilled carrier boats from HSP-1 recorded an estimated loss of 17.25%. Key players incurred an estimated financial loss amounting to PHP 223 million (USD 4.3 million). Low quality catch commonly sold as raw materials for canning, smoking, and fishmeal processing entail cheaper prices, thus regarded as losses. A positive correlation was established between fishing duration and losses. Results indicate that the current preservation technique in carrier boats could induce quality deterioration in fish given the long distances and transit times involved. Thus, the use of carrier boats with freezing system should be allowed in HSP-1 to sufficiently preserve the quality of the catch. This will reduce losses in post-harvest fisheries, thereby increasing the potential income of HSP-1 players
Comparative study of significant molluscans dwelling at two sites of Jiwani coast, Pakistan
Full text linkDuring the present study collectively eighty two (82) molluscan species have been explored from Bandri (25 04. 788 N; 61 45. 059 E) and Shapk beach (25 01. 885 N; 61 43. 682 E) of Jiwani coast. This study presents the first ever record of molluscan fauna from shapk beach of Jiwani. Amongst these fifty eight (58) species were found belonging to class gastropoda, twenty two (22) bivalves, one (1) scaphopod and one (1) polyplachopora comprised of thirty nine (39) families. Each collected samples was identified on species level as well as biometric data of certain species was calculated for both sites. Molluscan species similarity was also calculated between two sites. For gastropods it was remain 74 %, for bivalves 76 %, for Polyplacophora 100 % and for Scapophoda 0 %. Meanwhile total similarity of molluscan species between two sites was calculated 75 %. Notable identified species from Bandri and Shapak includes Oysters, Muricids, Babylonia shells, Trochids, Turbinids and shells belonging to Pinnidae, Arcidae, Veneridae families are of commercial significance which can be exploited for a variety of purposes like edible, ornamental, therapeutic, dye extraction, and in cement industry etc
Profile: TapasiDolui - Fisherwoman from West Bengal, India leading the struggle of fisherwomen in Tangrachar
Full text linkFrom child bride and adolescent mother to community leader, the journey of 48-year--old TapasiDolui, President of the women’s wing of Dakshinbanga Matysajibi Forum (DMF), a registered trade union of fisherfolk in West Bengal, India, though daunting and full of challenge, is an inspiration to women everywhere
Toxinas paralizantes de moluscos en el Mar Argentino: impacto, transferencia trófica y perspectiva
Full text linkEn el Mar Argentino, los dinoflagelados Gymodinium catenatum y el complejo Alexandrium tamarense/catenella producen potentes neurotoxinas (saxitoxinas) que pueden acumularse en moluscos y producir severas intoxicaciones en humanos conocidas como Intoxicación Paralizante por Moluscos. La transferencia de dichas toxinas a través de la cadena alimentaria puede tener consecuencias graves para la salud humana, la acuicultura, la pesca, la industria y la economía regional. Debido a las implicancias para la salud pública, se ha estudiado en profundidad el rol de los moluscos bivalvos en su transferencia. Sin embargo, es escasa la información que se posee sobre las toxinas bioacumuladas en el resto de los organismos marinos ya que no están sujetos a monitoreo. En un contexto de cambio climático global que puede favorecer la ocurrencia de eventos que involucren a las Toxinas Paralizantes de Moluscos (TPM), se presenta una síntesis de la información actualizada para el Mar Argentino sobre los dinoflagelados que las producen y su distribución, las toxinas involucradas y las transformaciones metabólicas que ocurren en su transferencia dentro de la red trófica. Se explora el impacto de las TPM en la integridad del ecosistema y las medidas de manejo y control que se utilizan para minimizar las consecuencias en la salud pública
Síntesis histórica y estado actual de la pesquería de vieira patagónica Zygochlamys patagonica (King 1832) en la Argentina. Biología, evaluación de biomasa y manejo
Full text linkLa vieira patagónica Zygochlamys patagonica (King 1832) es un molusco bivalvo que se distribuye alrededor de América del Sur en el área comprendida entre los 36° S en el Océano Atlántico y los 42° S en el Océano Pacífico. Las agregaciones más importantes a nivel comercial se encuentran en el Océano Atlántico a lo largo del frente de talud asociadas a la isobata de 100 m. La pesquería de esta especie en la Argentina se inició formalmente en 1996 con el esfuerzo pesquero de cuatro buques factoría arrastreros. En los últimos años el promedio de desembarques anuales se situó alrededor de las 5.000 t con un valor medio de USD 9.300 la tonelada de callo, cifra que la ubicaron entre las cuatro pesquerías más importantes del país. En el presente trabajo se describen los avances recientes en materia de investigación científica a 22 años de su inicio. Se detallan, además, los aspectos más relevantes en lo que respecta a biología, explotación comercial y evolución de las medidas de administración que llevaron a establecer un sistema de manejo adaptable
Growth yield, carcass traits, biochemical and non- specific immune parameters in grey mullet, Mugil cephalus Linnaeus, 1758 under cyclic starvation and L- carnitine supplementation
Full text linkThe main objective for the present research was to assess the effect of cyclic starvation and L- carnitine supplementation on growth (body final weight, hepatosomatic index (HSI), daily growth rate (DGI), feed conversion ratio (FCR) and voluntary feed intake (VFI)), body composition (crude protein, crude lipid, ash and moisture), biochemical (plasma total protein, glucose, cholesterol, triglyceride and liver glycogen) and immunological (lysozyme activity) parameters in grey mullet. To satisfy the foregoing end, a total of 240 fish with an average weight of 1.33±0.26 g were randomly divided into four groups (three replicates, 20 fish per tank). Two groups were fed on a daily basis and the other two ones were kept starved for 7 days once in 2 weeks. Two groups were fed a carnitine free basal diet and the remaining were fed a diet with 800 mg carnitine kg-1 . Cyclic starvation led to significantly decreased body final weight, DGI, FCR, total protein, triglyceride and cholesterol. On the contrary, no significant differences were found across all groups for FCR, HSI, glucose, liver glycogen and lysozyme concentrations. At the same time, the combined effects of cyclic starvation and carnitine supplementation were manifested in DGI and VFI parameters. In light of the above results, it can be noted that in both feeding regimes, growth, feed utilization and carcass quality in grey mullet increased upon adding 800 mg carnitine kg^-1 diet
Effects of different cooking methods on minerals, vitamins and nutritional quality indices of grass carp (Ctenopharyngodon idella)
Full text linkThis study aimed to evaluate the nutritional value (proximate composition, fatty acid profiles, vitamins and minerals) contents and also nutritional quality indices (NQI)) of grass carp (Ctenopharyngodon idella) prepared according to common consumer techniques: raw, poached, steamed, microwaved, pan-fried and deep-fried (in olive oil). In comparison to raw fish fillets, when grass carp was cooked there was an increase in protein, lipid and ash contents. Cooking methods had no significant effect on total n-3 fatty acids except for frying fillets. Lowest and highest content of n-3 was shown in deep-fried and pan-fried samples, respectively. Total n-6 fatty acid of cooked samples increased in comparison to raw samples. Na, K, Mg, P and Zn contents of boiled fish fillets significantly decreased. None of cooking methods had a significant effect a vitamin D. However, vitamin A, B_1 and B_3 contents of cooked fish significantly decreased
Effect of different levels of iron sulfate on some haematological parameters of ship sturgeon, Acipenser nudiventris
Full text linkThe present study was conducted to examine different dietary levels of iron (FeSO4) on some haematological parameters of ship sturgeon, Acipenser nudiventris including red blood cells (RBC), white blood cells (WBCs), differential WBCs, hematocrit (Hct), Hemoglobin (Hb), the mean corpuscular hemoglobin (MCH) and the mean corpuscular hemoglobin concentration (MCHC), the mean corpuscular volume (MCV), immunoglobulin (IgM), ferritin, transferrin and plasma Fe^2+. Four experimental treatments and one control group with three replicates were considered for the experiment. The experimental treatments were fish fed experimental diets containing different levels of FeSO_4 i.e. 100, 200, 250, and 300 mg kg. diet^-1. After 60 days, there were significant differences between experimental groups in terms of WBCs, lymphocytes, neutrophils, monocytes, eosinophils, MCH and MCHC, MCV, total plasma protein, IgM, ferritin, transferrin and plasma Fe^2+ (p<0.05). In the treatment fed 100 mg. iron kg. diet^-1, more levels of IgM and total plasma protein were observed compared to other experimental groups (p<0.05). The highest values of neutrophils, monocytes and MCHC were found in control fish whereas MCV, MCH and eosinophils values were higher in the treatment fed 200 mg. iron kg. diet^-1 (p<0.05). Also, more WBCs were observed in 250 mg. iron kg. diet^-1 treatment than in other groups (p<0.05). The values of lymphocytes, RBC, Hct, Hb, ferritin, transferrin and plasma Fe^2+ were higher in fish fed 300 mg. iron kg. diet^-1 compared to other experimental groups (p<0.05). In conclusion, our results showed that the supplementation of ship sturgeon diets with high levels of iron enhances the RBC, Hct, Hb, ferritin, transferrin and plasma iron