Seasonal reproduction and feeding ecology of giant isopods Bathynomus giganteus from the continental slope of the Yucatán peninsula

Barradas-Ortíz, Cecilia; Briones‐Fourzán, Patricia; Lozano‐Álvarez, Enrique

doi:10.1016/s0967-0637(03)00036-0

Cited by 33 publications

(19 citation statements)

References 38 publications

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“…1) is surrounded by a wide continental shelf that sustains many important fisheries, especially the western portion known as Campeche Bank, where benthic communities have been extensively studied (Flores-Hernández et al, 1997;Gracia & Vázquez-Bader, 1999). In contrast, little is known on benthic organisms, including H. ensifer, of the steep continental slope around the Yucatan Peninsula (Barradas-Ortiz et al, 2003;Wicksten & Packard, 2005), where currently no deep water fisheries exist. Samples were obtained over the period October 1985-August 2005 and encompassed different seasons (summer of 1989, 1990, and 2005; autumn of 1985, winter of 1996, and spring of 1999).…”

Section: Methodsmentioning

confidence: 99%

Relative growth and size at first maturity of the deep water shrimp,Heterocarpus Ensifer (Decapoda, Pandalidae) from the southern Gulf of Mexico

Lozano‐Álvarez

Vázquez-Bader

Briones‐Fourzán

et al. 2007

Crustac

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The pandalid shrimp, Heterocarpus ensifer occurs on continental slopes over the eastern and western Atlantic, and over some portions of the Indian and Pacific oceans. Despite its wide distribution, studies on the biology of this species are scant. In particular, there is no information on morphometric relationships or reproductive issues from any western Atlantic population. Although the general morphology of males and females of H. ensifer appears similar, we hypothesized that size at the onset of sexual maturity (SOM) and sexual dimorphism of H. ensifer could be examined with morphometric analyses, using those body dimensions most commonly measured in shrimp: carapace length (CL), body length (BL), rostral length (RL), and body weight (BW). We examined 754 H. ensifer from the southern Gulf of Mexico. SOM, determined through sequential reduced major axis regressions of BL, RL, relative rostral length (RRL = RL/CL), and BW against CL, was 23-24 mm CL in females and 21-22 mm CL in males. These sizes closely matched those of the smallest ovigerous females and the smallest males with appendices masculinae. Juveniles of both sexes showed similar morphometry and allometries, but ontogenetic allometry and morphometric sexual dimorphism occurred after maturity. In particular, the positive relationship (with negative allometry) between RL and CL shown in juveniles was lost after SOM in females and changed to enantiometry in males, despite a wide dispersion of data. The rostral polymorphism may be related to the protracted, year-round reproductive activities of this Gulf of Mexico population. Morphometric techniques may be useful to compare populations of H. ensifer from disparate locations. RESUMENEl camarón pandálido Heterocarpus ensifer habita en el talud continental de los océanos Atlántico oriental y occidental y en algunas partes del Índico y Pacífico. A pesar de la amplia distribución de esta especie, los estudios sobre su biología son escasos. En particular, no existe información sobre 3 ) e-mail: elozano@mar.icmyl.unam.mx © Koninklijke Brill NV, Leiden, 2007 Crustaceana 80 (5): 555-568 Also available online: www.brill.nl/cr 556 ENRIQUE LOZANO-ÁLVAREZ ET AL.relaciones morfométricas o aspectos reproductivos de ninguna población del Atlántico occidental. Aunque la morfología general es similar en ambos sexos de H. ensifer, se planteó la hipótesis de que la talla de primera madurez sexual (TPM) y el dimorfismo sexual pueden examinarse a través de análisis morfométricos, utilizando las dimensiones corporales más comúnmente medidas en camarones: longitud cefalotorácica (LC), longitud corporal (LCo), longitud rostral (LR) y peso corporal (PCo). Se examinaron 754 H. ensifer recolectados en el sur del Golfo de México. La TPM, determinada por medio de regresiones secuenciales con eje mayor reducido de las dimensiones LCo, LR, longitud rostral relativa (LRR = LR/LC) y PCo contra la LC, fue de 23-24 mm LC en hembras y 21-22 mm LC en machos. Estas tallas coincidieron con las tallas de las hembras ovígeras más pequeñas y los...

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Section: Methodsmentioning

confidence: 99%

Relative growth and size at first maturity of the deep water shrimp,Heterocarpus Ensifer (Decapoda, Pandalidae) from the southern Gulf of Mexico

Lozano‐Álvarez

Vázquez-Bader

Briones‐Fourzán

et al. 2007

Crustac

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“…This colonization of organic matter by bioluminescent bacteria may produce a background glow that could be used by deep-sea scavengers (Nishida et al, 2002), if their eyes were sensitive enough to see it. Deep-sea isopods are thought to be scavengers (reviewed in Barradas-Ortiz et al, 2003), and an eye with an extremely long integration time might be able to visualize dimly glowing detritus, aiding the animal in finding a target initially tracked via chemoreception.…”

Section: Temporal Resolution and Photosensitivitymentioning

confidence: 99%

Light and vision in the deep-sea benthos: II. Vision in deep-sea crustaceans

Frank

Johnsen

Cronin

2012

Journal of Experimental Biology

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SUMMARYUsing new collecting techniques with the Johnson-Sea-Link submersible, eight species of deep-sea benthic crustaceans were collected with intact visual systems. Their spectral sensitivities and temporal resolutions were determined shipboard using electroretinography. Useable spectral sensitivity data were obtained from seven species, and in the dark-adapted eyes, the spectral sensitivity peaks were in the blue region of the visible spectrum, ranging from 470 to 497nm. Under blue chromatic adaptation, a secondary sensitivity peak in the UV portion of the spectrum appeared for two species of anomuran crabs: Eumunida picta ( max 363nm) and Gastroptychus spinifer ( max 383nm). Wavelength-specific differences in response waveforms under blue chromatic adaptation in these two species suggest that two populations of photoreceptor cells are present. Temporal resolution was determined in all eight species using the maximum critical flicker frequency (CFF max ). The CFF max for the isopod Booralana tricarinata of 4Hz proved to be the lowest ever measured using this technique, and suggests that this species is not able to track even slow-moving prey. Both the putative dual visual pigment system in the crabs and the extremely slow eye of the isopod may be adaptations for seeing bioluminescence in the benthic environment.

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“…Bathynomids (Crustacea, Isopoda Cirolanidae), belonging to the "supergiants group" of isopods (Lowry and Dempsey, 2006), were for a long time conspicuous because of their big size (Barradas-Ortiz et al, 2003;Iwasaki et al, 2001;Tsukamoto et al, 2000;Soong and Mok, 1994;Perry and Hinsch, 1991;Tso and Mok, 1991;Wetzer, 1986). Bathynomus Milne Edwards, 1879, is one of the few isopod genera known from the fossil record (Karasawa and Nobuhara, 2008;Bruce and Bussarawit, 2004;Obata and Omori, 1993;Wieder and Feldmann, 1992;Karasawa et al, 1992;Anonymous, 1992;Wieder and Feldmann, 1989;Imiazumi, 1953).…”

Section: Introductionmentioning

confidence: 99%

“…They are scavengers, carnivorous and active predators of fishes, crustaceans or squids, mostly diseased or injured (Barradas-Ortiz et al, 2003). When caught in the net, they tear off meat from the captured fishes.…”

Section: Introductionmentioning

confidence: 99%

First record of three giant marine Bathynomids (Crustacea, Isopoda, Cirolanidae) from India

et al. 2011

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Seasonal reproduction and feeding ecology of giant isopods Bathynomus giganteus from the continental slope of the Yucatán peninsula

Cited by 33 publications

References 38 publications

Relative growth and size at first maturity of the deep water shrimp,Heterocarpus Ensifer (Decapoda, Pandalidae) from the southern Gulf of Mexico

Relative growth and size at first maturity of the deep water shrimp,Heterocarpus Ensifer (Decapoda, Pandalidae) from the southern Gulf of Mexico

Light and vision in the deep-sea benthos: II. Vision in deep-sea crustaceans

First record of three giant marine Bathynomids (Crustacea, Isopoda, Cirolanidae) from India

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