A new cysteine proteinase was isolated from the digestive juice of the American lobster (Homarus americanus). The enzyme was purified by a combination of affinity and ion-exchange chromatography and gel filtration. The cysteine proteinase accounted for 80 % of the proteolytic activity in the lumen of the hepatopancreas. The most potent heavy-metal inhibitors were Hg, Cu, and Ag ions. Inhibition...

Social behavior confers numerous benefits to animals but also risks, among them an increase in the spread of pathogenic diseases. We examined the trade-off between risk of predation and disease transmission under different scenarios of host spatial structure and disease avoidance behavior using a spatially explicit, individual-based model of the host pathogen interaction between juvenile Caribb...

Increases in spiny lobster size and abundance have been observed within some marine protected areas (MPAs). To date, the potential economic benefits of these changes have been assumed to derive from the effects of emigration of adult lobster to adjacent fishing grounds and/or increased larval export to downstream nurseries that sustain fisheries. According to economic theory, these effects may ...

Panulirus argus Virus 1 (PaV1) is the first virus known to be pathogenic to a wild lobster. It infects the Caribbean spiny lobster P. argus from the Florida Keys, and has a predilection for juveniles. The monitoring of the virus in wild populations and study of its behavior in the laboratory require the development of reliable diagnostic tools. A sensitive and specific fluorescence in situ hybr...

Larvae of malacostracan crustaceans represent a large fraction of modern day zooplankton. Plankton is not only a major part of the modern marine ecosystem, but must have played an important role in the ecosystems of the past as well. Unfortunately, our knowledge about plankton composition of the past is still quite limited. As an important part of today's zooplankton, malacostracan larvae are s...

The binding of the carotenoid astaxanthin (AXT) in the protein multimacromolecular complex crustacyanin (CR) is responsible for the blue coloration of lobster shell. The structural basis of the bathochromic shift mechanism has long been elusive. A change in color occurs from the orange red of the unbound dilute AXT (lambda(max) 472 nm in hexane), the well-known color of cooked lobster, to slate...

Spiny lobster populations within the Bocas del Toro archipelago appear lo be ovcrexploiicd. Extensive visual surveys over a wide area of reef habitat down to 20 m in depth indicate mean lobster abundance, si/cs. and percent maturity levels for both Paniilinix argu.% and P. guiiaiux below other areas in the region. The almost complete absence of cgg-bcaring female lobsters may have serious impli...

Puerulus atau yang biasa dikenal dengan benur lobster merupakan fase transisi antara phyllosoma dan juvenile pada life cycle lobster. Penangkapan biasanya menggunakan jaring pocong. Kurangnya pengetahuan nelayan di Kecamatan Simpenan terkait penanganan dibuktikan fakta bahwa hasil tangkapan pernah mengalami mortalitas. Tujuan penelitian ini adalah mendeskripsikan unit penangkapan, operasional p...

This research was conducted in February-March 2021. The study Nubatukan District, Lembata Regency. purpose of this to determine the type and size lobster caught by fishermen waters Lewoleba Bay, Regency, East Nusa Tenggara. methods used collecting data are survey interview methods. Based on results study, researchers found two types namely: Bamboo Lobster (Panulirus versicolor) Pearl ornatus). ...

Palabuhanratu Bay is a location in the southern part of Java Island with high lobster population. Based on field observation, population dominated by Panulirus homarus (green sand lobster), versicolor (bamboo penicillatus (black and ornatus (pearl lobster). This study aimed to develop spatial model using satellite-derived data predict potential harvest grounds Bay. The Earth observational satel...