Population biology and secondary production of the sandhopper Pseudorchestoidea brasiliensis (Amphipoda:Talitridae) at Prainha Beach, Brazil

Cardoso, Ricardo S.; Vg, Veloso

doi:10.3354/meps142111

Cited by 84 publications

(67 citation statements)

References 26 publications

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“…Closer to the equator, talitrids tend to reproduce through the year, e.g. Pseudorchestoidea brasiliensis, in Brazil (Rio de Janeiro) (Cardoso & Veloso, 1996), or Talorchestia quoyana, in New Zealand (Marsden, 1991b). These results with T. saltator reinforce the idea that large-scale distribution patterns do not correspond to ÔfixedÕ species physiology, as already suggested by Kevin and Spicer (1998) for O. gammarellus.…”

Section: Recruitment and Sex Ratiosupporting

confidence: 78%

“…There, life span was estimated at 21 months for males and 18 months for females, while sexual differentiation occurred 3 or 4 months after birth (Williams, 1978). The results are, nevertheless, closer to life-span estimations obtained for other talitrid species: 12 months for Orchestia gammarellus in the British Isles (Jones & Wigham, 1993), 6-8 months for Orchestia meditterranea, Orchestia montagui, and Orchestia platensis in the Mediterranean (Louis, personal communication), 13 months for Talorchestia quoyana in New Zealand (Marsden, 1991a), or 12-21 months for Pseudorchestoidea brasiliensis in Brazil (Cardoso & Veloso, 1996). Life span among talitrids appears, therefore, to be extremely variable.…”

Section: Growth and Life Cyclesupporting

confidence: 62%

“…A sex ratio favourable to females appears to be the most common situation among talitrid populations, e.g. in Orchestia gammarellus (Jones & Wigham, 1993;Persson, 1999), Peudorchestoidea brasiliensis (Cardoso & Veloso, 1996), or Talitrus saltator (Williams, 1978). The reason for this sex ratio is unclear.…”

Section: Recruitment and Sex Ratiomentioning

confidence: 98%

“…A few estimations could, nevertheless, be found for other talitrid species: P ¼ 2:9ÿ7:2 g m ÿ2 yr ÿ1 for Talorchestia capensis (DW) (Van Senus & McLachlan, 1986), approximately equivalent to 51.5-127.9 kJ m ÿ2 yr ÿ1 (Jørgensen et al, 1991), with a P= B B ratio of 2.25 yr ÿ1 , and P ¼ 0:3 g m ÿ2 yr ÿ1 AFDW (7.2 kJ m ÿ2 yr ÿ1 ) for Pseudorchestoidea brasiliensis, with a P= B B ratio of 2.16-2.3 yr ÿ1 (Cardoso & Veloso, 1996).…”

Section: Secondary Productionmentioning

confidence: 99%

“…In fact, there are few studies on the reproductive biology and population dynamics of talitrids (Hartog, 1963;Jones & Wigham, 1993;Marsden, 1991a;Palluault, 1954;Persson, 1999;Van Senus, 1988;Williams, 1978;Williamson, 1951a), and even less on secondary production (e.g. Cardoso & Veloso, 1996;Van Senus & McLachlan, 1986).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Talitrus saltator (Amphipoda, Talitridae) biology, dynamics, and secondary production in Atlantic (Portugal) and Mediterranean (Italy and Tunisia) populations

Marques

Gonçalves

Pardal

et al. 2003

Estuarine, Coastal and Shelf Science

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Talitrus saltator biology, population dynamics, and reproduction were studied more or less simultaneously at three sand beaches: Lavos, on the western coast of Portugal; Collelungo, on the Italian coast of the Thyrrenian Sea; and Zouara, on the northern coast of Tunisia. The species exhibited a consistent pattern of aggregated distribution. Densities were higher at Lavos than at Collelungo and Zouara. Reproduction took place from early March to late September at Lavos and Collelungo, and from late February to early November at Zouara. The average sex ratio was favourable to males at Lavos and Collelungo, and to females at Zouara. Based on data from Lavos, the population abundance was positively correlated with temperature, while the percentage of juveniles in the population was positively correlated with temperature and sediment moisture. Adult individuals from the Atlantic population were larger than the Mediterranean ones, while newborn individuals from the Mediterranean were slightly larger than Atlantic ones. Life span was estimated at 7-11 months at Lavos, 6-9 months at Collelungo, and 6-8 months at Zouara. Cohorts born at the beginning of the reproductive period tend to have shorter lives than the ones born later in the season, with longer life spans occurring in cohorts that crossed the winter to breed in the next year. The minimum period necessary for sexual differentiation after birth was estimated at AE4 weeks at Lavos, AE3 weeks at Collelungo, and AE4.5 weeks at Zouara, for males, and AE6 weeks at Lavos, and AE5 weeks at Collelungo and Zouara, for females. The period necessary for female's sexual maturation after being born was estimated at AE10 weeks at Lavos, and AE8 weeks at Collelungo and Zouara. At the studied sites, T. saltator appeared as semiannual species, with iteroparous females appearing to produce at least two broods per year, and exhibited a bivoltine life cycle. Growth production (P) was estimated at 0.74 g m ÿ2 yr ÿ1 ashfree dry weight (AFDW; 17.7 kJ m ÿ2 yr ÿ1 ) at Lavos, 0.12 g m ÿ2 yr ÿ1 AFDW (2.8 kJ m ÿ2 yr ÿ1 ) at Collelungo, and 0.61 g m ÿ2 yr ÿ1 AFDW (14.3 kJ m ÿ2 yr ÿ1 ) at Zouara. Elimination production (E) was estimated at 1.40 g m ÿ2 yr ÿ1 AFDW (33.5 kJ m ÿ2 yr ÿ1 ) at Lavos, 0.20 g m ÿ2 yr ÿ1 AFDW (4.8 kJ m ÿ2 yr ÿ1 ) at Collelungo, and 1.11 g m ÿ2 yr ÿ1 AFDW (26.6 kJ m ÿ2 yr ÿ1 ) at Zouara. The average annual biomass ð B BÞ (standing stock) was estimated at 0.13 g m ÿ2 at Lavos, 0.014 g m ÿ2 at Collelungo, and 0.084 g m ÿ2 at Zouara, resulting in P= B B ratios of 5.7 at Lavos, 8.2 at Collelungo, and 7.3 at Zouara, and E= B B ratios of 10.8 at Lavos, 14.4 at Collelungo, and 13.1 at Zouara. The present results, combined with information from literature, revealed a geographic variation in T. saltator populations with regard to their morphological characteristics, growth rates, life spans, and life cycles.

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Section: Recruitment and Sex Ratiosupporting

confidence: 78%