Internal Anatomy

McLaughlin, Patsy A.

doi:10.1016/b978-0-12-106405-1.50012-6

Cited by 52 publications

(43 citation statements)

References 153 publications

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“…While in H. gammarus the vas deferens has morphological and histological similarities to H. americanus and N. norvegicus, it has less similarity with Cherax albidus. Depending on the species, the vas deferens may be divided into 3 to 10 different regions [40]. In H. gammarus the vas deferens is divided into 3 regions (proximal, medial, distal vas deferens), as in most of the individuals in the infraorder Astacidea.…”

Section: Testismentioning

confidence: 99%

Morphological and histochemical examination of male and female gonads in Homarus gammarus (L. 1758)

Erkan

Ayun

2013

Open Life Sciences

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The reproductive organs of both male and female European lobsters (Homarus gammarus) are H-shaped gonads that lie dorsal to the gut on the large hepatopancreas. The ovary consists of a pair of tubular, parallel lobules with a connecting bridge. The germarium of the ovary containing oogonia is concentrated in the center of the ovarian lobe. As oogonesis proceeds, the oocytes move to the peripheral regions of the ovary. The follicle cells begin to surround the oocytes in the previtellogenic stage, and the mature oocytes are completely surrounded by the follicle cells. Carbohydrates exist in both early and late vitellogenic oocytes that give PAS positive reaction. However, their rising protein content in late vitellogenic oocytes makes them stain with Bromophenol blue. Testes show convoluted lobules with a germinal epithelium and a central collecting duct, and the paired vasa deferentia have three distinct parts. Spermatophores are nonpedunculate and tubular, which extrude as a continuous column and consist of a sperm mass covered with primary and secondary layers. The primary layer stains with Bromophenol Blue and gives a PAS positive reaction. But the secondary layer only weakly stains with Bromophenol Blue. The histochemical results may indicate that the function of the two layers is different.

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Section: Testismentioning

confidence: 99%

Morphological and histochemical examination of male and female gonads in Homarus gammarus (L. 1758)

Erkan

Ayun

2013

Open Life Sciences

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“…The male reproductive system is located dorsally in the pleon, as in other Anomura (McLaughlin 1983, Krol et al 1992, whereas in other decapod crustaceans, the reproductive organs are located in the cephalothorax (McLaughlin 1983, Krol et al 1992, Amadio & Mantelatto 2009). The basic composition of the reproductive system, including a pair of testes connected to a pair of VD that open to the exterior via gonopores, is similar to that seen in other decapods (Matthews 1953, McLaughlin 1983, Krol et al 1992 Morphological and histological features of the VD are associated with spermatophore development in that spermatophore formation is determined by the secretory, muscular and glandular activities of the VD (Mouchet 1931).…”

Section: Reproductive Systemmentioning

confidence: 99%

“…The male reproductive system in Decapoda is typically composed of a pair of testes connected to a pair of vasa deferentia (VD) that open to the exterior via gonopores located on the ventral side of the coxae of the fifth pair of pereiopods (Matthews 1953, McLaughlin 1983, Krol et al 1992. The VD can be externally divided into proximal, median and distal regions (McLaughlin 1983, Amadio & Mantelatto 2009).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The VD can be externally divided into proximal, median and distal regions (McLaughlin 1983, Amadio & Mantelatto 2009). The testes and VD are generally located in the cephalothorax, but in some anomuran families, including hermit crabs, the gonads are situated in the pleon (McLaughlin 1983, Krol et al 1992. The male reproductive apparatus of hermit crabs has a speciesspecific morphology and has recently been used in phylogenetic studies (Tudge 1997, Tirelli et al 2006, 2008.…”

Section: Introductionmentioning

confidence: 99%

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