Functional morphology of mouthparts and digestive system during larval development of the cleaner shrimp Lysmata amboinensis (de Man, 1888)

Abstract

Mouthpart and alimentary canal development was examined in Lysmata amboinensis larvae using scanning electron microscopy and histology. The gross morphological features of external mouthparts and internal digestive tract structures of larvae at different developmental stages indicate that ingestive and digestive capabilities are well developed from early on. With increasing age of the larvae the mouthpart appendages increased in size, the hepatopancreas in tubular density and the midgut in length. The density of setae and robustness of teeth and spines of individual structures increased. The most pronounced changes from early to late stage larvae involved formation of pores on the paragnaths and labrum, transformation of the mandibular spine-like teeth to molar cusps, development of the filter press in the proventriculus and of infoldings in the previously straight hindgut. The results suggest that early stage L. amboinensis larvae may benefit from soft, perhaps gelatinous prey, whereas later stages are better equipped to handle larger, muscular or more fibrous foods.

Cleaner fishes and shrimp diversity and a re‐evaluation of cleaning symbioses

“…In conclusion, Turnbull (1981) stated that A. pedersoni did not possess the functional morphology to confirm this shrimp was a cleaner (Limbaugh, 1961). However, his observations by SCUBA were undoubtedly of larger adult stages of parasitic crustaceans, as these were visible, and the midgut section of the shrimp may have revealed remnants of ectoparasites (Tziouveli, Bastos Gomes, & Bellwood, 2011). Although Spotte (1998) Note: this is not a depiction of regional diversity or taxa distributions, rather an estimate of regional research to demonstrate understudied areas for future focus cleaner shrimp species tested removed and consumed juveniles of the parasitic cymothoid isopod Anilocra haemuli (Cymothoidae).…”

“…In conclusion, Turnbull () stated that A. pedersoni did not possess the functional morphology to confirm this shrimp was a cleaner (Limbaugh, ). However, his observations by SCUBA were undoubtedly of larger adult stages of parasitic crustaceans, as these were visible, and the midgut section of the shrimp may have revealed remnants of ectoparasites (Tziouveli, Bastos Gomes, & Bellwood, ). Although Spotte () considered this evidence enough to suggest that cleaner shrimp as cleaners of fishes be dismissed, Bunkley‐Williams and Williams () and McCammon et al .…”

“…Conversely, the paragnaths in carnivorous crustaceans are less intricate than those of non-carnivores (Hunt, Winsor, & Alexander, 1992). The investigation of the comparative morphology of these structures between different cleaning shrimp may help determine what these shrimp consume in the wild (Tziouveli et al, 2011).…”

Functional cytology of the hepatopancreas of decapod crustaceans

“…The hepatopancreass originates from the midgut anlage near its junction with the stomach (Figure a,b). The morphogenesis of the hepatopancreas has been described for species from various higher taxa including the penaeid shrimps Penaeus setiferus (Linnaeus, 1767) (Lovett & Felder, ), Penaeus vannamei Boone, 1931 (Muhammad, Zhang, Shao, Dong, & Muhammad, ), and Ploeticus muelleri (Spence Bate, 1888) (Díaz, Fernandez Gimenez, Velurtas, & Fenucci, ), the caridean shrimp Lysmata amboinensis (de Man, 1888) (Tziouveli, Bastos‐Gomez, & Bellwood, ), the lobster Homarus americanus H. Milne Edwards, 1837 (Biesiot & McDowell, ; Factor, ), the spiny lobsters Palinurus ornatus (Fabricius, 1798) (Smith et al, ) and Jasus edwardsii (Hutton, 1875) (Nishida, Takahashi, & Kittaka, ) and the brachyuran crabs Carcinus maenas (Linnaeus, 1758) (Spitzner et al, ), Paralithodes camtschaticus (Tilesius, 1815) (Abrunhosa & Kittaka, ), and Maja brachydactyla Balss, 1922 (Castejón et al, ).…”

Palinurid lobster aquaculture: nutritional progress and considerations for successful larval rearing

“…This methodology has hence been widely employed from an ecological viewpoint as a means of evaluating trophic niches (Alexander 1988;Steele & Steele 1993;Watling 1993;Richter & Kornicker 2006). However, this form of investigation has also proven useful as a starting point for dietary and feeding preference studies in commercially important aquaculture species, and as such, has been implemented widely in this context (Nishida et al 1990;Hunt et al 1992;Lavalli & Factor 1992;Johnston & Alexander 1999;Nelson et al 2002;Cox & Johnston 2003a;Johnston et al 2008;Chakraborty et al 2011;Tziouveli et al 2011). The topic of feeding and digestive biology in phyllosoma has been reviewed previously in detail (Cox & Johnston 2003b).…”