Population dynamics and reproductive strategy of Scolelepis goodbodyi (Polychaeta: Spionidae) in a subtropical atlantic beach

Abstract

ABSTRACT. The population dynamics and reproductive strategy of the polychaete Scolelepis goodbodyi (Jones, 1962), were investigated between June 2009 and May 2010 at Manguinhos beach, southeastern, Brazil. A total of 9,242 individuals were collected. The density did not differ significantly from one month to another. The estimated values of the growth, recruitment, and mortality rates were studied using the width of the third setiger and the growth curves for the populations were adjusted by the Bhattacharya method (Lϱ= 1.23, K = 1.2, mortality = 0.73). Two annual cohorts were identified in the period. Significant differences between males and females were observed in the population ( 2 = 71.6, p < 0.01) and between sexually defined and sexually indeterminate individuals ( 2 = 158.4, p < 0.01). Five stages of gonadal development were identified. The coexistence of recruits and mature individuals throughout the study period suggests that this population presented continuous reproduction.

Euryhalinity of subtropical marine and estuarine polychaetes evaluated through carbonic anhydrase activity and cell volume regulation

“…In contrast, heavy rains or even the influence of freshwater from beach groundwater can result in low salinities (Horn, 2002, 2006). Intertidal zones of sandy beaches can show a high range of salinities, from 7 to 37 PSU (Cartwright, 2004; Leao, Gomes, Costa, & Santos, 2012). We can infer that this species probably faces a high range of salinities in its habitat.…”

Brazilian sandy beaches: characteristics, ecosystem services, impacts, knowledge and priorities

“…Species with broad geographic distributions, such as the crustaceans Emerita brasiliensis, Excirolana brasiliensis (PAGLIOSA et al, 1998;CARDOSO, 1999;PETRACCO et al, 2003;CAETANO et al, 2006;EUTRÓPIO et al, 2006), and Ocypode quadrata (TURRA et al, 2005;BLANKENSTEYN, 2006; NEVES; BEMVENUTI, 2006; ARAUJO et al, 2008;SOUZA et al, 2008;MAGALHÃES et al, 2009;POMBO;, the bivalve Anomalocardia brasiliana (ARRUDA-SOARES et al, 1982;NARCHI, 1976;BARREIRA;ARAUJO, 2005;LUZ;BOEHS, 2011;MATTOS;CARDOSO, 2012;RODRIGUES et al, 2013;BELÉM et al, 2013;CORTE et al, 2014, CORTE, 2015CORTE et al 2015), and the polychaetes Scolelepis spp (SANTOS, 1991(SANTOS, , 1994SOUZA, BORZONE, 2000;MACCORD, AMARAL, 2007;LEÃO et al, 2012) were the most studied species.…”

SECONDARY PRODUCTION OF Scolelepis goodbodyi (POLYCHAETA: SPIONIDAE) IN A TROPICAL SANDY BEACH IN THE SOUTHWESTERN ATLANTIC, BRAZIL

“…Scolelepis goodbodyi (Spionida, Spionidae) is a macrobenthic species occurring in the Caribbean Sea (Jamaica, Port Hendenson, Green Bay) and the Atlantic Ocean (Brazil, northern and southern coasts), in dissipative sandy beaches, where they are frequently dominante in abundance and biomass (Souza & Gianuca 1995, Souza & Borzone 2000, Degraer et al 2003. They present continuous reproduction throughout the year (Maccord & Amaral 2007). Population dynamics and secondary production data of Scolelepis and other Spionidae are available and differ locally mainly due to variations in the environmental conditions of the studied sites (García-Arberas & Rallo 2004, Kevrekidis 2005, Speybroeck et al 2007, Leão et al 2012, as well as differences in the life history of the species (Cusson & Bourget 2005).…”