Do the day/night periods and tidal cycles modulate the abundance and distribution of Callinectes danae Smith, 1869 (Brachyura, Portunidae) in an estuary-bay complex from southeastern Brazil?

Pescinelli, Régis Augusto; Koury, Helena Ansanello; Bochini, Gabriel Lucas; Lopes, Mateus; Costa, Rogério Caetano da

doi:10.1590/2358-2936e2020038

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…The number of fishers sampled varied according to the fishers' activity and logistical survey constraints. Only nocturnal fishing trips were sampled to ensure a similar, high catchability of macroinvertebrates that are usually more active at night than at day (Pescinelli et al, 2020). This decision was supported by the fact that we observed that trawl net fishing was mostly nocturnal in the survey area.…”

Section: Characterization Of Benthic Macroinvertebrate Catchesmentioning

confidence: 99%

Seagrass macroinvertebrate bycatches support mosquito net trawl fishery in Madagascar

Herinirina,

Bigot,

Frouin

et al. 2023

Aquat. Living Resour.

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The use of mosquito nets, primarily for targeting small and/or juvenile fish, has rapidly increased in Western Indian Ocean shallow seagrass beds and coral reefs over the last 20 years. However, to date, invertebrate by-catch by locally-made fishing gear has not been reported. We studied the mosquito net trawl fishery in seagrass areas in the Bay of Toliara, Southwest Madagascar through the GPS tracking of fishers from August 2018 to February 2019. Catches were monitored through monthly landing surveys to characterize spatial temporal patterns in the abundance and diversity of macroinvertebrates in the seagrass beds. Fishing was carried out at low tide, mostly at night, by fishers pulling a hand-made trawl net of varying dimensions. Overall, 43 macroinvertebrate taxa were identified out of 217,080 individuals collected from 109 catch samples. Catches were generally composed of crustaceans (mainly Portunidae, Processidae, Penaeidae, and Alpheidae). The crab Thalamita mitsiensis largely dominated the abundance and biomass of the macroinvertebrate assemblage (from 6% to 100% and from 5 to 100% of the overall density and biomass, respectively). Macroinvertebrates composed 1.5% to 100% of the total catch per trip (i.e., 4–55 kg trip−1). They were sold for human consumption or animal feed, which provided additional income to fishers (USD 1–24 trip−1 and 1–72% of catch income per trip). This study revealed that macroinvertebrate resources provide valuable by-catch to small-scale fishers in Southwest Madagascar. This bycatch generates income that further encourages the use of mosquito net trawls and exacerbates their negative effects on coastal seagrass ecosystems and fisheries.

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Section: Characterization Of Benthic Macroinvertebrate Catchesmentioning

confidence: 99%

Seagrass macroinvertebrate bycatches support mosquito net trawl fishery in Madagascar

Herinirina,

Bigot,

Frouin

et al. 2023

Aquat. Living Resour.

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Body shape variations help to diminish taxonomy uncertainty in juvenile swimming crab Callinectes Stimpson, 1860

Lane-Medeiros

Moraes

Alencar

et al. 2021

Zoologischer Anzeiger

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Do the day/night periods and tidal cycles modulate the abundance and distribution of Callinectes danae Smith, 1869 (Brachyura, Portunidae) in an estuary-bay complex from southeastern Brazil?

Abstract: Do the day/night periods and tidal cycles modulate the abundance and distribution of Callinectes danae Smith, 1869 (Brachyura, Portunidae) in an estuary-bay complex from southeastern Brazil?

Cited by 2 publications

References 29 publications

Seagrass macroinvertebrate bycatches support mosquito net trawl fishery in Madagascar

Seagrass macroinvertebrate bycatches support mosquito net trawl fishery in Madagascar

Body shape variations help to diminish taxonomy uncertainty in juvenile swimming crab Callinectes Stimpson, 1860

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