Mortality of Kalliapseudes schubartii in unvegetated soft bottoms of the estuarine region of the Lagoa dos Patos

Fonseca, Duane Barros da; D’Incao, Fernando

doi:10.1590/s1516-89132006000300011

Cited by 13 publications

(5 citation statements)

References 7 publications

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“…The author has associated the latter result with the hatching season of insect larvae that could act as predators of tanaids in summer months. Fonseca & D'Incao (2006) reported that the mortality rates of K. schubartii did not differ between sampled seasons at Patos Lagoon. However they agree that this tanaid species might be heavily preyed by juvenile fishes and decapods; and that the expected higher mortality in summer/spring might not apply to unvegetated soft bottom estuaries.…”

Section: Discussionmentioning

confidence: 97%

Population structure of Sinelobus cf. stanfordi (Crustacea, Tanaidacea) from Pinheiros River mangrove, Guaratuba Bay, southern Brazil

2016

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An analysis of the population structure of the tanaid Sinelobus cf. stanfordi was performed at Pinheiros River mangrove, Guaratuba Bay, Paraná State, southern Brazil (25°49′S 48°34′W). Fifteen samples of 12 × 12 cm were obtained bimonthly from the surface of galleries (interconnected burrow complex) constructed by the adult mangrove crab Ucides cordatus from June 2007 to April 2008. The carapace length (CL) of a total of 714 tanaids was measured. Tanaids were divided into four demographic categories: males (M), ovigerous females (OV), preparatory females (PREP) and non-reproductive individuals (NREP) with a mean CL of 0.55, 0.49, 0.48 and 0.43 mm, respectively. In the NREP group, specimens smaller than 0.32 mm were classified as juveniles. NREP predominated in all sampling months, and among sexually mature individuals, a strong predominance of females was observed throughout the study period. Temporal fluctuations in abundance were observed, with a peak in August 2007. The reproductive period of this species is continuous, with a peak in the summer, like most S. cf. stanfordi populations.

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Section: Discussionmentioning

confidence: 97%

Population structure of Sinelobus cf. stanfordi (Crustacea, Tanaidacea) from Pinheiros River mangrove, Guaratuba Bay, southern Brazil

2016

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“…The first highest point was used to estimate each regression line. Capture curves were estimated for each sex and region separately and compared by covariance analysis (ANCOVA) (Fonseca & D’Incao, 2006; Keunecke et al, 2007). Also, Z was defined as the sum of the fishing mortality coefficient (F) caused by fishing operations, and the natural mortality coefficient (M) that includes predation, competition, disease, and adverse environmental conditions.…”

Section: Methodsmentioning

confidence: 99%

Growth parameters, longevity, and mortality of the seabob shrimp Xiphopenaeus spp. (Decapoda: Penaeidae) in four important fishing regions of southeastern Brazil

Miazaki

Heckler

Santos

et al. 2021

Fisheries Oceanography

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We investigated and compared growth parameters, longevity, mortality (total, natural, and fishing), and exploitation rates of the seabob shrimp Xiphopenaeus spp. in four important fishing regions of southeastern Brazil. The hypothesis that the growth and mortality characteristics of distinct populations differ along a latitudinal gradient was tested. Sampling was performed monthly in Macaé, Ubatuba, Santos/São Vicente, and Cananéia over a 1‐ to 2‐year period. Growth and longevity parameters were estimated by the von Bertalanffy growth equation models. Total mortality (Z) was estimated by length‐converted catch curves. Growth parameters differed between sexes: males reached smaller sizes, showed larger growth coefficients (k) and higher mortality, and lived less than females in the four studied regions. Rather than finding a latitudinal gradient, our results support the hypothesis that distinct local environmental characteristics and fishing pressures alter the growth and population dynamics of Xiphopenaeus spp. in different areas. Our study indicates that the stocks of Xiphopenaeus spp. are overexploited, highlighting the importance of management plans to prevent the collapse of stocks and maintain them at sustainable levels for long‐term exploitation.

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“…There are 39 species in the primarily circumtropical family Kalliapseudidae [ 7 ], which was inferred to be monophyletic on the basis of three molecular loci [ 8 ]. Members of this family, in addition to being deposit feeding as other tanaidaceans, are thought to be filter feeders based on the rows of long plumose setae on their chelipeds [ 9 , 10 ]. F. P. P. Leite and P. E. P. Leite [ 11 ] provided evidence that Kalliapseudes gianucai , described by Bacescu [ 12 ] and known only from the type locality in the state of Rio Grande do Sul, Brazil, represents a dimorphic male stage and is thus a synonym of M. schubarti .…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Distribution and Population Structure of Monokalliapseudes schubarti (Tanaidacea: Kalliapseudidae) in an Estuary in Southern Brazil

Freitas-Júnior

Christoffersen

Araújo³

et al. 2013

The Scientific World Journal

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Monokalliapseudes schubarti is an endemic tanaidacean microcrustacean from southeastern Brazil to Uruguay inhabiting low energy estuaries. Saco da Fazenda is located in the estuary of the Itajaí-Açú River, state of Santa Catarina, Brazil. It is exposed to strong anthropic impact and receives intensive flows of domestic wastewater, solid residues, and drainage activities. Specimens of M. schubarti were collected monthly, in the intertidal and subtidal regions of Saco da Fazenda, in four stations defined as a function of the physiography of the environment during the period of July 2003 to June 2004. Fecundity values were high, with continuous reproductive activity during the whole period of study. The greatest population densities were observed in the intertidal region, where they are nevertheless intensely consumed by birds, swimming crabs, and fish. This species represents a fundamental link in the food chain of Saco da Fazenda, transferring energy from the detritus level to higher trophic levels. Habitat disturbance and high organic matter may represent factors controlling the distribution of populations of M. schubarti. For this reason, the species may be used to monitor anthropic effects in estuarine areas.

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Mortality of Kalliapseudes schubartii in unvegetated soft bottoms of the estuarine region of the Lagoa dos Patos

Cited by 13 publications

References 7 publications

Population structure of Sinelobus cf. stanfordi (Crustacea, Tanaidacea) from Pinheiros River mangrove, Guaratuba Bay, southern Brazil

Population structure of Sinelobus cf. stanfordi (Crustacea, Tanaidacea) from Pinheiros River mangrove, Guaratuba Bay, southern Brazil

Growth parameters, longevity, and mortality of the seabob shrimp Xiphopenaeus spp. (Decapoda: Penaeidae) in four important fishing regions of southeastern Brazil

Spatiotemporal Distribution and Population Structure of Monokalliapseudes schubarti (Tanaidacea: Kalliapseudidae) in an Estuary in Southern Brazil

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