REPARTICIÓN DE RECURSOS ALIMENTARIOS ENTRE LA ICTIOFAUNA DOMINANTE DE UNA LAGUNA TEMPLADA DE BAJA CALIFORNIA SUR, MÉXICO

Se describe el uso de recursos alimentarios en las cinco especies de peces más abundantes en Laguna San Ignacio, Baja California Sur, México (Occidentarius platypogon, Cynoscion parvipinnis, Menticirrhus undulatus, Trachinotus paitensis y Heterodontus francisci). Fueron analizados los espectros tróficos, los cambios temporales, la amplitud de dieta, la diversidad de presas y el traslape trófico. Se identificaron un total de 49 tipos alimenticios, los cuales fueron agrupados en seis grupos taxonómicos: crustáceos, moluscos, anélidos, equinodermos, sipuncúlidos y peces. Los crustáceos y moluscos aportaron un mayor número de presas, representando más del 75% de las presas identificadas. Callinectes bellicosus, Penaeus californiensis, Squilla spp., Donax spp., Lucapinella milleri, Anachis spp. y Bittium spp., fueron las presas más importantes en los espectros descritos. Los espectros alimentarios presentaron diferencias temporales en la composición de presas. Todos los depredadores presentaron valores bajos de amplitud de dieta. Se determinó un bajo traslape trófico, excepto entre O. platypogon y C. parvipinnis, en los que se encontró que la sobreposición de dietas es significativa (> 60%). Los resultados demuestran que cada especie tiene diferentes hábitos alimentarios que les permite segregarse a lo largo de las dimensiones del nicho trófico. Proponemos que la partición de recursos alimentarios es importante solo para peces con mayor traslape trófico. Las diferencias en morfología de sus aparatos alimentarios parecen estar correlacionadas con el tipo de presas consumidas. Differential use of food resources by dominant fish of San Ignacio Lagoon, Baja California Sur, Mexico The use of food resources in five of the most abundant fish species (Occidentarius platypogon, Cynoscion parvipinnis, Menticirrhus undulatus, Trachinotus paitensis and Heterodontus francisci) in San Ignacio Lagoon, Baja California Sur, Mexico is described. Prey composition, seasonal changes, diet breadth, trophic diversity and trophic overlap were analyzed. Forty nine prey items were identified, grouped into six taxonomic groups: crustacea, molluska, osteichthyies, anellida, equinodermata and sipunculida. Crustaceans and mollusks were the most important items recorded, representing over 75% of the identified prey. The crustaceans Callinectes bellicosus, Penaeus californiensis, Squilla spp., megalop larvae of portunids and the mollusks Donax spp., Lucapinella milleri, Anachis spp., and Bittium spp. were the most important prey in the fish species analyzed. Differences in the prey composition and seasonal changes were observed, as well as seasonal changes in the diet breadth. All the predators examined had low percentages of breadth of diet, being characterized as opportunists with low levels of trophic diversity. There was only one case of higher prey overlap between O. platypogon and C. parvipinnis. We concluded that food resource partitioning is very important only in those fish species with higher overlap in their diets. Differences in bucal morphology seem related to prey selection.

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Diet seasonality and food overlap of the fish assemblage in a pantanal pond

Neotropical Ichthyology ◽

10.1590/s1679-62252008000400004 ◽

2008 ◽

Vol 6 (4) ◽

pp. 567-576 ◽

Cited By ~ 61

Author(s):

Gisele Caroline Novakowski ◽

Norma Segatti Hahn ◽

Rosemara Fugi

Keyword(s):

Fish Assemblage ◽

Food Resource ◽

Fish Fauna ◽

Diet Breadth ◽

Food Resources ◽

Dry Season ◽

Trophic Guilds ◽

Trophic Specialization ◽

Mato Grosso ◽

Mean Values

We assessed the trophic structure of the fish fauna in Sinhá Mariana pond, Mato Grosso State, from March 2000 to February 2001. The aim was to determine the feeding patterns of the fish species during the rainy and dry seasons. The diets of 26 species (1,294 stomach contents) were determined by the volumetric method. Insects and fish were the most important food resources: insects were the dominant food of 23% and 27% of the species, respectively, in the rainy and dry season, and fish was the dominant item for 31% of the species in both seasons. Cluster analysis (Euclidean Distance) identified seven trophic guilds in the rainy season (detritivores, herbivores, insectivores, lepidophages, omnivores, piscivores and planktivores), and five trophic guilds in the dry season (detritivores, insectivores, lepidophages, omnivores and piscivores). The smallest mean values of diet breadth were observed for the specialist guilds (detritivores, lepidophages and piscivores), in both seasons. The widest means for diet breadth were observed for the omnivores, regardless of the season. In general, there was no seasonal variation in feeding overlap among the species studied. At the community level, diet overlap values between species were low (< 0.4) for 80% of the pairs in each season, suggesting wide partitioning of the food resource. The fish assemblage showed a tendency toward trophic specialization, regardless of the season, although several species changed their diets. We might consider two non-excludent hypothesis: that there is no pattern on the use of seasonal food resources and/or probably there are several patterns, because each one is based on characteristics of the studied site and the taxonomic composition of the resident species.

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Seasonal changes in a fish assemblage associated with mangroves in a coastal lagoon of Baja California Sur, Mexico

Latin American Journal of Aquatic Research ◽

10.3856/vol39-issue2-fulltext-6 ◽

2011 ◽

Vol 39 (2) ◽

pp. 250-260 ◽

Cited By ~ 4

Author(s):

Jesus Rodriguez Romero ◽

Laura Lopez Gonzalez ◽

Felipe Galvan Magana ◽

Francisco J. Sanchez Gutierrez ◽

Roxana B. Inohuye Rivera ◽

...

Keyword(s):

Coastal Lagoon ◽

Fish Assemblage ◽

Seasonal Changes ◽

Baja California ◽

Baja California Sur

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The length-weight relationship parameters of demersal fish species off the western coast of Baja California Sur, Mexico

Journal of Applied Ichthyology ◽

10.1111/j.1439-0426.2008.01175.x ◽

2009 ◽

Vol 25 (1) ◽

pp. 114-116 ◽

Cited By ~ 2

Author(s):

J. Rodríguez-Romero ◽

D. S. Palacios-Salgado ◽

J. López-Martínez ◽

S. Hernández Vázquez ◽

J. I. Velázquez-Abunader

Keyword(s):

Fish Species ◽

Baja California ◽

Demersal Fish ◽

Western Coast ◽

Baja California Sur ◽

Weight Relationship

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Helminth parasites of some freshwater fishes from Baja California Sur, Mexico

Zootaxa ◽

10.11646/zootaxa.2327.1.3 ◽

2010 ◽

Vol 2327 (1) ◽

pp. 44 ◽

Cited By ~ 9

Author(s):

Oscar Méndez ◽

Guillermo Salgado-Maldonado ◽

Juan Manuel Caspetamandujano ◽

Guillermina Cabañas-Carranza

Keyword(s):

Freshwater Fish ◽

Introduced Species ◽

Fish Species ◽

Baja California ◽

Parasite Species ◽

New Records ◽

Helminth Parasites ◽

Baja California Sur ◽

Poeciliid Fish ◽

Bodies Of Water

Nine freshwater fish species were sampled from 13 bodies of water in Baja California Sur state, on the Baja California peninsula, Mexico. Twenty-four helminth parasite species of 19 genera and from 13 families were recorded. All are new records for the region, but have been recorded previously in Mexico. No endemic helminth species were identified. Most helminths were larval forms of generalist Nearctic species transported by ichthyophagous birds, in addition to five anthropogenically introduced species. Poeciliid fish are the most widely distributed in the oases and other waters of Baja California Sur, and their helminths are the most common on the peninsula.

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New fish species added to the ichthyofauna of Laguna Ojo de Liebre, Baja California Sur, México

AQUATIC RESEARCH ◽

10.3153/ar21029 ◽

2021 ◽

Vol 4 (4) ◽

pp. 343-350

Author(s):

Laura Civico-Collados ◽

Jorge A. Rosales-Casián

Keyword(s):

Fish Species ◽

Baja California ◽

Biosphere Reserve ◽

Commercial Fishing ◽

Gray Whale ◽

Baja California Sur ◽

The Pacific ◽

Fish Aggregation ◽

New Fish Species ◽

Species Movement

The Laguna Ojo de Liebre (Scammon’s lagoon) is the iconic sanctuary of the Pacific gray whale and belongs to the El Vizcaino Biosphere Reserve in Baja California, México. From June 2015 to August 2016, six seasonal visits were conducted on the ichthyofauna in seven sites of the lagoon. By diving, trapping, hook & line, and gillnet commercial fishing, a total number of 39 fish species was identified belonging to 25 families. In this study a total number of eight fish species is added to the first two existing 20-year-old lists: the Gymnothorax mordax (Ayres, 1859), Apogon sp. Pomacanthus zonipectus (Gill, 1862), Balistes polylepis (Steindachner, 1876), Pareques viola (Gilbert 1898), Caranx sp., Sphoeroides lobatus (Steindachner, 1870), and the Icelinus sp. During 2015-2016, two anomalous events warmed the lagoon, and possibly, it contributed to the fish species movement from the adjacent tropical or subtropical zones. Ichthyofauna from Laguna Ojo de Liebre is reported here before the installation of reef modules as a refuge for red lobster and fish aggregation.

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