Distribution of loliginid squids in a eutrophicated tropical coastal bay

Moraes, Maria Cecilia Medeiros; Lavrado, Helena Passeri

doi:10.1080/17451000.2016.1262041

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Off the coast Rio de Janeiro, juvenile D. sanpaulensis were found entering the warm Guanabara Bay (22°43'S), during flood tide, tracking bottom landward intrusions of cold SACW. In this case, squid seems to use the physiologically suitable near-bottom temperature field to exploit the abundant food resources inside this eutrophized tropical coastal bay (Moraes and Lavrado 2017).…”

Section: Spatial Patterns Resulting From Environmental Variabilitymentioning

confidence: 99%

Biology, distribution and geographic variation of loliginid squids (Mollusca: Cephalopoda) off southwestern Atlantic

Martins¹,

Juanicó²

2018

Zoologia

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The biology and ecology of southwestern Atlantic loliginid squids have been intensively researched in the last few decades, mostly off the Brazilian southern coast. However, information gathered by scientific research cruisers, either past or recent, is limited. Three species of loliginid squids – the warm-tempered Doryteuthissanpaulensis (Brakoniecki, 1984), plus the tropical D.pleii (Blainville, 1823) and Lolligunculabrevis (Blainville, 1823) – were sampled along 16 degrees of latitude on the southwestern Atlantic (22–38°S). The samples were obtained mostly from oceanographic surveys, but also included squids caught by commercial fisheries, and a few specimens from museum collections. Squid response to abiotic variables, morphological variation and circadian behaviour were surveyed in detail. Doryteuthissanpaulensis can be divided into at least six distinguishable geographical groups, which do not form a cline. In contrast, D.pleii can be divided into only two morphological groups that are very similar. Doryteuthis spp. were heterogeneously distributed on the shelf, whereas L.brevis was confined nearshore. Our data extended the southernmost distribution range of D.pleii by at least nine degrees of latitude, owing to specimens obtained at ~38°S (Mar del Plata, Argentina). Small, immature D.sanpaulensis were sampled inside the Patos Lagoon estuary (~32°S). The morphologically similar Doryteuthis spp. apparently avoid direct competition by concentrating at different depths, displaying different thermal preferences, and inverse circadian levels of activity. The information reported herein may be regarded as a “snapshot” of the ecology of sympatric squids in a marine environment that has not been deeply affected by climate change.

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Section: Spatial Patterns Resulting From Environmental Variabilitymentioning

confidence: 99%

Biology, distribution and geographic variation of loliginid squids (Mollusca: Cephalopoda) off southwestern Atlantic

Martins¹,

Juanicó²

2018

Zoologia

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“…The main environmental issue in guanabara Bay is the input of domestic sewage without treatment, while in Sepetiba Bay is the waste of heavy metals from industrial activities (Fiori et al 2013). However, the bays still exhibit characteristics of typical tropical estuaries, such as high primary productivity and favourable conditions for growth and reproduction of many estuarine and marine species (Araújo et al 2006, gomes et al 2013, Da Silva et al 2016, Moraes and lavrado 2017.…”

Section: Introductionmentioning

confidence: 99%

Morphometric variation in pink shrimp populations at Rio de Janeiro coast (SE Brazil): are they really similar in closer areas?

Carvalho

Keunecke

Lavrado

2019

An. Acad. Bras. Ciênc.

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Farfantepenaeus brasiliensis and F. paulensis are the most exploited shrimps of Se-S Brazilian coast. Our aim was to verify if adjacent nursery areas with different environmental condition (Sepetiba and Guanabara bays, SE Brazil) influence on shrimp populations (eg, CPUE) and body shapes. Samplings were carried out during 12 months in those bays ca. 85 Km far from each other. Carapace length (Cl), total body length (Tl), wet weight, abdomen size and Tl/Cl ratio were used to analyze variations in shape through regressions. In general, F. brasiliensis was 4 to 6 times more abundant than F. paulensis. The sex ratio differed from 1:1 in F. brasiliensis in both bays, with dominance of females, largest catches occur in autumn. However, differences in size and morphology were found between bays, mainly regarding the Tl/Cl ratio. Shrimps in Sepetiba Bay have higher Tl/Cl showing a more "elongated shape" (larger abdomen) when compared to those from guanabara Bay. Results suggest the existence of an estuary vs shrimp morphology relationship which results in differences in body shape even in spatially close areas. TL/CL ratio has proven useful for assessing shrimp populations differences and might be tested for tracking the origin of adult shrimps stocks at the coast.

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Multi-year changes of a benthic community in the mid-intertidal rocky shore of a eutrophic tropical bay (Guanabara Bay, RJ – Brazil)

Puga

Torres

Paiva

et al. 2019

Estuarine, Coastal and Shelf Science

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Distribution of loliginid squids in a eutrophicated tropical coastal bay

Cited by 4 publications

References 29 publications

Biology, distribution and geographic variation of loliginid squids (Mollusca: Cephalopoda) off southwestern Atlantic

Biology, distribution and geographic variation of loliginid squids (Mollusca: Cephalopoda) off southwestern Atlantic

Morphometric variation in pink shrimp populations at Rio de Janeiro coast (SE Brazil): are they really similar in closer areas?

Multi-year changes of a benthic community in the mid-intertidal rocky shore of a eutrophic tropical bay (Guanabara Bay, RJ – Brazil)

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