Communication structures vary greatly in size and can be structurally and behaviorally integrated with other systems. In structurally integrated systems, dramatic changes in size may impose trade-offs with the size of neighboring structures. In spiny lobsters (Palinuridae), there is a fivefold difference in size of the antennular plate, on which sound producing apparatus is located, such that t...

Studies of the evolution turtle shell morphology have raised numerous questions. In this study, five adult females and two males Endangered Spiny Hill Turtle Heosemys spinosa from localities in western Sarawak East Malaysia (Borneo) were examined for presence plastral deossification zones, reported as indicative kinesis earlier studies. A total 52 (34 females, 18 males) radiographs demonstrated...

The morphology of larvae is a key factor influencing their behaviour, performance and ultimately survival. There evidence indicating significant morphological variability among broods, that this may be related to the size or conditions mother. However, maternal influence not consistent across decapod crustaceans. Using 35 broods from different mothers crab Hemigrapsus takanoi collected in same ...

Abstract The food habits of the blue swimming crab, Portunus segnis (Forskål, 1775) were investigated using specimens collected from trawl catches in north-east Persian Gulf, June 2018 to May 2019. Feeding 304 adult female crabs, ranging 2.6 8.7 cm carapace length, analysed. stomach content examined crabs showed consist crustaceans, fish, molluscs, unidentifiable material, sea grass and foramin...

Abstrak. Keberadaan populasi penyu mengalami penuruan yang disebabkan oleh berbagai faktor alami dan aktifitas manusia. Di Indonesia banyak pantai menjadi lokasi bertelur nya penyu, salah satunya yaitu Pantai Rantau Sialang terletak di Desa Pasie Lembang, Kluet Selatan, Aceh Selatan. Sejak tahun 2010 Sialag telah dijadikan sebagai Stasiun Konservasi Penyu. Penelitian ini bertujuan untuk mengeta...

Boxfishes (Teleostei: Ostraciidae) are marine fishes having rigid carapaces that vary significantly among taxa in their shapes and structural ornamentation. We showed previously that the keels of the carapace of one species of tropical boxfish, the smooth trunkfish, produce leading edge vortices (LEVs) capable of generating self-correcting trimming forces during swimming. In this paper we show ...

Menaethiops abumusa n. sp. is closely similar to M. bicornis Alcock, 1985, and M. gadaniensis Kazmi & Tirmizi, 1999, regarding the relatively contiguous rostral spines. The new species is easily distinguishable from its two congeners by having distinctly round angles of orbital eaves and distally divergent rostral spines. Whereas in M. bicornis, and M. gadaniensis, the angles of orbital eaves a...

Data on population size, adult sex ratio, body size and mass are provided for a population of the turtle Emys orbicularis near Pazarağaç (Afyonkarahisar/Turkey). Using the mark-recapture method (triple catch), a population size of 664 turtles was estimated (95% confidence interval, range 332–996), corresponding to a density of 83 turtles per hectare (range 41.5–124.5). The adult sex-ratio was s...

A new species of freshwater crab, Potamonautes danielsisp. n., is described from the southern region of the KwaZulu-Natal Province, South Africa. Potamonautes danielsi most closely resembles Potamonautes sidneyi which is re-described here, but can be distinguished by a suite of key morphological characters including carapace shape and width, slim pereopods, inflated propodi of the chelipeds, an...

Phrynus longipes (Pocock 1894) is a top predator among arboreal invertebrates in the Luquillo Mountains of Puerto Rico, but many aspects of its ecology remain poorly understood. We sampled four of the most abundant tree species in the Luquillo Mountains during the dry and wet seasons of 2008 to evaluate microhabitat preferences of this species. In the dry season, P. longipes occurred significan...