scholarly journals Nematode parasites in the striped mullet (Mugil cephalus Linnaeus, 1758) in the southern Gulf of California

2020 ◽  
Vol 48 (1) ◽  
pp. 106-113
Author(s):  
Ana R. Álvarez-Sánchez ◽  
Yuniel Méndez-Martínez ◽  
Juan José Reyes-Pérez ◽  
Carlos R. Romo-Quiñonez ◽  
Galdy Hernández-Zárate
Keyword(s):  
Gulf Of California ◽  
Coastal Lagoons ◽  
Mugil Cephalus ◽  
Hepatosomatic Index ◽  
Average Intensity ◽  
Natural Ecosystems ◽  
Striped Mullet ◽  
Nematode Parasites ◽  
Average Abundance ◽  
Lagoon Systems

Coastal lagoons are an important component of the Gulf of California as they are considered natural ecosystems with high productivity and home to species of regional economic interest such as the striped mullet (Mugil cephalus), which, for its eating habits tends to present parasitism. The objective of the present work was to identify and determine the number of nematode parasites in the striped mullet in three lagoon systems (Navachiste, La Reforma, and Ceuta) in coastal areas of the southern Gulf of California. Thirty Mugil cephalus were randomly obtained from each of the lagoon systems. From each fish was obtained the total length, weight and condition factor (FC), next was dissected to be analyzed hepatosomatic index (HSI) and determine by direct count the prevalence, average intensity and average abundance of nematode; nematodes are identified taxonomically and molecularly. The nematode parasites found to belong to the genus Contracaecum of the family Anisakidae in all the fish sampled the parasitic prevalence was 67%. The nematode parasites found by sex indicated that 77% of the striped mullet females analyzed were parasitized, while the males presented 59%. The CF obtained was 1.17- 4.07, and the HSI ranged between 0.85 and 1.45; the average intensity for nematodes was 7.45, and the average abundance was 4.97, demonstrating that Contracaecum multipapillatum is the main nematode parasite present in all lagoon systems the southern Gulf of California.

Offshore Spawning of the Striped Mullet, Mugil cephalus, in the Gulf of Mexico

Copeia ◽  
1958 ◽  
Vol 1958 (2) ◽  
pp. 130 ◽  
Author(s):  
Edgar L. Arnold ◽  
John R. Thompson
Keyword(s):  
Gulf Of Mexico ◽  
Mugil Cephalus ◽  
Striped Mullet

Ontogenesis of osmotic regulation in the striped mullet, Mugil cephalus L.

1982 ◽  
Vol 20 (1) ◽  
pp. 79-86 ◽  
Author(s):  
F. G. Nordlie ◽  
W. A. Szelistowski ◽  
W. C. Nordlie
Keyword(s):  
Mugil Cephalus ◽  
Osmotic Regulation ◽  
Striped Mullet

Steroid profiles during maturation and induced spawning of the striped mullet, Mugil cephalus L.

Aquaculture ◽  
1991 ◽  
Vol 95 (1-2) ◽  
pp. 149-168 ◽  
Author(s):  
Clyde S. Tamaru ◽  
Christopher D. Kelley ◽  
Cheng-Sheng Lee ◽  
Katsumi Aida ◽  
Isao Hanyu ◽  
...  
Keyword(s):  
Mugil Cephalus ◽  
Striped Mullet ◽  
Induced Spawning ◽  
Steroid Profiles

scholarly journals Índices Parasitários de Brevimulticaecum sp. (Nematoda: Heterocheilidae) Em Potamotrygon motoro (Chondrichthyes: Potamotrygonidae) Capturados no Arquipélago do Bailique, Macapá

2021 ◽  
Vol 24 (5-esp.) ◽  
pp. 511-515
Author(s):  
Antonio Carlos Freitas Souza ◽  
Cecile Souza Gama ◽  
Anderson Luiz Pena da Costa ◽  
Jociel Ferreira Costa ◽  
Diego Carvalho Viana
Keyword(s):  
Digestive Tract ◽  
The State ◽  
Average Intensity ◽  
Behavioral Differences ◽  
Host Association ◽  
The North ◽  
Spiral Valve ◽  
Average Abundance ◽  
Parasitic Parameters

O número de nematódeos descritos em elasmobrânquios é relativamente pequeno, sendo encontrados majoritariamente no trato digestório. Apesar de alguns relatos descritos, a literatura a respeito ainda é considerada escassa principalmente sobre a associação parasita-hospedeiro. Diante disso, o objetivo deste trabalho foi avaliar os índices parasitários de larvas Brevimulticaecum sp. na válvula espiral de Potamotrygon motoro provenientes do arquipélago do Bailique, em Macapá no estado do Amapá, Brasil. Registrou-se em 20,41% das raias coletadas a presença de larvas de Brevimulticaecum sp., sendo a intensidade média de 20,10 larvas/peixe e a abundância média de 4,10. São poucos os registros deste parasito em peixes no Brasil, sendo que já foi relatada sua ocorrência no estômago de P. motoro e Potamotrygon falkneri. As diferenças entre os parâmetros parasitários podem ser um indicador de alimentação e/ou diferenças comportamentais entre os sexos. Este é o primeiro estudo sobre nematóides de potamotrigonídeos na região Norte, ampliando o conhecimento da biodiversidade desta região.   Palavras-chave: Helmintos. Nematoda; Elasmobrânquio. Válvula Espiral.   Abstract The number of nematodes described in elasmobranchs is relatively small, being found mostly in the digestive tract. Despite some reports described, the literature on this subject is still considered scarce, mainly on the parasite-host association. Therefore, the objective of this work was to evaluate the parasitic indices of Brevimulticaecum sp. the Potamotrygon motoro spiral valve from the Bailique archipelago, in Macapá in the state of Amapá, Brazil. Larvae of Brevimulticaecum sp. Were recorded in 20.41% of the rays collected, with an average intensity of 20.10 larvae / fish and an average abundance of 4.10. There are few records of this parasite in fish in Brazil, and its occurrence in the stomach of P. motoro and Potamotrygon falkneri has been reported. Differences between parasitic parameters can be an indicator of diet and / or behavioral differences between genders. This is the first study on potamotrigonid nematodes in the North, expanding knowledge of this region's biodiversity.   Keywords: Helminths. Nematoda. Elasmobranchs. Spiral Valve.

Predation on Striped Mullet (Mugil cephalus) by Crocodylus niloticus at St. Lucia, South Africa

Copeia ◽  
1979 ◽  
Vol 1979 (2) ◽  
pp. 266 ◽  
Author(s):  
Alan K. Whitfield ◽  
Stephen J. M. Blaber
Keyword(s):  
South Africa ◽  
Mugil Cephalus ◽  
Striped Mullet

Distribution patterns of the warrior swimming crab, Callinectes bellicosus, fishery in Bahía Magdalena, Baja California Sur, Mexico

Crustaceana ◽  
2019 ◽  
Vol 92 (11-12) ◽  
pp. 1279-1293 ◽  
Author(s):  
Juan C. Castro-Salgado ◽  
Mauricio Ramírez-Rodríguez ◽  
Gustavo-De la Cruz-Agüero ◽  
Verónica Castañeda-Fernández-de-Lara
Keyword(s):  
Gulf Of California ◽  
Coastal Lagoons ◽  
Warm Season ◽  
Distribution Patterns ◽  
Cold Season ◽  
Swimming Crab ◽  
Mexican Pacific ◽  
Temporal Behaviour ◽  
Average Size ◽  
Bahia Magdalena

Abstract Spatial and temporal distribution patterns of the warrior swimming crab Callinectes bellicosus fishery in the Mexican Pacific were investigated. Geo-referenced commercial trap capture data derived from 44 trips in the Bahia Magdalena were analysed. Three fishing zones (Z1, inner; Z2, middle; Z3, mouth of the bay) and two climate seasons (warm, July-December; and cold, January-June) were defined previously. There were 1099 traps in Z1, 715 in Z2 and 2111 in Z3; in the warm season, 2091 traps were checked, whereas 1834 were checked in the cold season. The average number of individuals per trap (CPUE) varied by sex, zone and season, however, male crabs always predominated. During the warm season, large males (CW > 115 mm) exhibited the greatest value of CPUE. On average, the males represented 77% during the warm season and 84% during the cold season. The average size of the males (125 ± 0.843 mm CW) was significantly higher than the average size of females (121 ± 1.140 mm CW). The catch was composed of large mature males but females were absent in Z1; in comparison, both large mature males and females, in addition to ovigerous females, composed the catch at the mouth of the bay (Z3). Crab abundance was notably reduced in the cold season, especially for female crabs. The temporal behaviour of the warrior swimming crab in Bahia Magdalena is similar to that reported from the coastal lagoons of the Gulf of California; however, the low presence of females throughout the year could be related to their preferred environmental conditions, which include deeper areas with more current circulation, like those that occur at the mouth of the bay. These data corroborate the necessity to interpret with caution the crab population dynamics solely based on results derived from fishing with traps in coastal lagoons.

Analysis of crab size structure and the fishing effort applied to a crab fishery in northwest Mexico

Crustaceana ◽  
2018 ◽  
Vol 91 (2) ◽  
pp. 225-237 ◽  
Author(s):  
César A. Heredia-Delgadillo ◽  
Guillermo Rodríguez-Domínguez ◽  
Raúl Pérez-González ◽  
Nicolás Castañeda-Lomas ◽  
Sergio G. Castillo-Vargasmachuca ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Size Structure ◽  
Coastal Lagoons ◽  
Low Frequency ◽  
Fishing Effort ◽  
Double Ring ◽  
Northwest Mexico ◽  
Fishing Gears ◽  
Fishery Cooperatives ◽  
Ring Net

The fishing effort of a Sinaloa crab fishery in the Gulf of California in 2014 was analysed based on fishermen’s interviews, official catches and permits, and information from a sample of fishing logbooks from five fishery cooperatives operating in four coastal lagoons that contained the daily catch from individual fishing trips. Unauthorized gear, a double-ring net (DR), was used most frequently (>70% of the fishers) for crab fishing, although authorized single-ring nets and Chesapeake traps (CT) were also used with low frequency. The estimated fishing effort was 641 boats/day in the four coastal lagoons, which was 34% more than authorized, and 818 boats/day were employed in all of Sinaloa. A total of 57 479 fishing gears were estimated for the study area, which was 49.9% greater than the maximum authorized number, and 80 822 nominal fishing gears were estimated for the entire Sinaloa crab fishery, 14.15% more than the total gear limit (70 800). The size of the mesh used in the gear was smaller than the authorized limit of 76 mm, and >50% of the catches included crabs of unlawful size. It is argued that the effort must be regulated in terms of the number of vessels, per unit time, and not the number of gears. The information from this study demonstrates a failure to monitor compliance with current regulations and thus means that other strategies for the sustainable management of the fishery, such as co-management, should be tested.

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