Laboratory Survival of Alloteuthis Subulata (Cephalopoda: Loliginidae) from the Plymouth Area

1985 ◽  
Vol 65 (4) ◽  
pp. 845-855 ◽  
Author(s):  
Marek R. Lipiński
Keyword(s):  
Adult Size ◽  
Squid Species ◽  
Loligo Opalescens ◽  
Loligo Vulgaris ◽  
In Captivity

INTRODUCTIONWild-caught squids have seldom survived for very long in laboratory aquaria. Tardent (1962) maintained Loligo vulgaris Lamarck, 1789 for a maximum of 60 days. Choe & Oshima (1963), Choe (1966) and LaRoe (1971) reared squids of the genus Sepioteuthis from eggs to adult size. Between 1975 and 1982 several successful attempts to maintain Loliginidae (e.g. Matsumoto, 1976; Hanlon, Hixon & Hulet, 1978, 1983; Yang et al. 1980, 1983) and Ommastrephidae (Flores et al. 1976; Flores, Igarashi & Mikami, 1977; O'Dor, Durward & Balch, 1977) were made. But to date only ten squid species have been maintained for more than forty days (review: Yang et al. 1980; Boletzky & Hanlon, 1983). Loligo opalescens Berry, 1911 holds the record for longevity in captivity at 233 days from egg to adult (Yang et al., 1983).

A new arboreal Lepidodactylus (Reptilia: Gekkonidae) from Espiritu Santo Island, Vanuatu: from egg to holotype

Zootaxa ◽  
2008 ◽  
Vol 1918 (1) ◽  
pp. 26-38 ◽  
Author(s):  
IVAN INEICH
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Primary Forest ◽  
Adult Size ◽  
The West ◽  
In Captivity ◽  
Group Ii

Lepidodactylus buleli is a new gecko from Espiritu Santo Island, central Vanuatu, Melanesia. This species most closely resembles L. pulcher from Admiralty Islands (Papua New Guinea) by its elevated number of midbody scale rows, and belongs to Brown and Parker’s (1977) Group II based on having an entire terminal scansor on all digits followed by two or three divided or deeply notched subterminal scansors on digits II–V. It differs from other Group II species in having the following combination of character states: a high number of scales around midbody, relatively weak dilation of digits, slight webbing of toes III and IV, cloacal spurs, and an original coloration. This species lives in myrmecophilous plants hanging high on trees in the deep primary forest on the west dry coast of Espiritu Santo Island. It also is the first lizard known from a holotype collected as an egg in the field, hatched in captivity, and grown until reaching adult size, allowing its description.

Simulating the indirect handline jigging effects on the European squid Loligo vulgaris in captivity

2011 ◽  
Vol 110 (3) ◽  
pp. 435-440 ◽  
Author(s):  
Miguel Cabanellas-Reboredo ◽  
Josep Alós ◽  
Miquel Palmer ◽  
Roman Grädel ◽  
Beatriz Morales-Nin
Keyword(s):  
Loligo Vulgaris ◽  
In Captivity

Reproduction, Growth and Survival of Young in the Mountain Possum, Trichosurus Caninus (Marsupialia)

1976 ◽  
Vol 24 (2) ◽  
pp. 189 ◽  
Author(s):  
RA How
Keyword(s):  
Body Weight ◽  
Sex Ratio ◽  
Linear Relationship ◽  
Reproductive Organs ◽  
Head Length ◽  
Adult Size ◽  
Growth And Survival ◽  
Significant Difference ◽  
In Captivity

The biology of T. caninus was examined in the field and in captivity over a 4-year period. The season of parturitions is restricted, with more than 87% of births between February and May. The sex ratio of the pouch young did not differ from parity and there was no significant difference between frequency of suckling of right or left teat, alternate teats being used during successive lactations. Measurements of 10 known-age individuals showed that head length (y) had a linear relationship to age (t) up to 210 days (regression, t = 2.917y - 19.355). Ear length and pes length were not linearly related to age. The young emerge from the pouch 175-200 days after birth, remain physically dependent on their mothers for the next 2-3 months and are weaned at > 240 days. Individuals in the field could be assigned to 1-year-old, 2-year-old or adult categories by a combination of head length, body weight and condition of external reproductive organs. Females may mature at 2 years old, although only 50% produce young at this age. The testis approximates adult size in the latter half of their third year. Survival of the dependent young is low, only 51.8% and 37.9% reaching 175 days and 1 year old respectively.

Persistence of giants: population dynamics of the limpet Scutellastra laticostata on rocky shores in Western Australia

2020 ◽  
Vol 646 ◽  
pp. 79-92
Author(s):  
RE Scheibling ◽  
R Black
Keyword(s):  
Population Dynamics ◽  
Western Australia ◽  
Size Structure ◽  
Survival Rates ◽  
Maximum Size ◽  
High Rate ◽  
Adult Survival ◽  
Rocky Shores ◽  
Adult Size ◽  
Decadal Time Scale

Population dynamics and life history traits of the ‘giant’ limpet Scutellastra laticostata on intertidal limestone platforms at Rottnest Island, Western Australia, were recorded by interannual (January/February) monitoring of limpet density and size structure, and relocation of marked individuals, at 3 locations over periods of 13-16 yr between 1993 and 2020. Limpet densities ranged from 4 to 9 ind. m-2 on wave-swept seaward margins of platforms at 2 locations and on a rocky notch at the landward margin of the platform at a third. Juvenile recruits (25-55 mm shell length) were present each year, usually at low densities (<1 m-2), but localized pulses of recruitment occurred in some years. Annual survival rates of marked limpets varied among sites and cohorts, ranging from 0.42 yr-1 at the notch to 0.79 and 0.87 yr-1 on the platforms. A mass mortality of limpets on the platforms occurred in 2003, likely mediated by thermal stress during daytime low tides, coincident with high air temperatures and calm seas. Juveniles grew rapidly to adult size within 2 yr. Asymptotic size (L∞, von Bertalanffy growth model) ranged from 89 to 97 mm, and maximum size from 100 to 113 mm, on platforms. Growth rate and maximum size were lower on the notch. Our empirical observations and simulation models suggest that these populations are relatively stable on a decadal time scale. The frequency and magnitude of recruitment pulses and high rate of adult survival provide considerable inertia, enabling persistence of these populations in the face of sporadic climatic extremes.

Avipoxvirus detected in tumor-like lesions in a white-faced whistling duck (Dendrocygna viduata)

2020 ◽  
Vol 40 (10) ◽  
pp. 818-823
Author(s):  
Juliana F.V. Braga ◽  
Rodrigo M. Couto ◽  
Marcelo C. Rodrigues ◽  
Roselene Ecco
Keyword(s):  
Squamous Cell Carcinoma ◽  
Phylogenetic Analysis ◽  
Protein Gene ◽  
Core Protein ◽  
Avian Species ◽  
Tissue Samples ◽  
Histopathological Evaluation ◽  
In Captivity ◽  
Avian Pox ◽  
Tumor Like Lesions

ABSTRACT: Avipoxvirus is the etiological agent of the avian pox, a well-known disease of captive and wild birds, and it has been associated with tumor-like lesions in some avian species. A white-faced whistling duck (Dendrocygna viduata) raised in captivity was referred to a Veterinary Teaching Hospital in Northeast due to cutaneous nodules present in both wings. A few days after the clinical examination, the animal died naturally. Once submitted to necropsy, histopathological evaluation of the lesions revealed clusters of proliferating epithelial cells expanding toward the dermis. Some of these cells had round, well-defined, intracytoplasmic eosinophilic material suggestive of poxvirus inclusion (Bollinger bodies). PCR performed on the DNA extracted from tissue samples amplified a fragment of the 4b core protein gene (fpv167), which was purified and sequenced. This fragment of Avipoxvirus DNA present in these tumor-like lesions showed high genetic homology (100.0%) with other poxviruses detected in different avian species in several countries, but none of them were related to tumor-like lesions or squamous cell carcinoma. This is the first report of Avipoxvirus detected in tumor-like lesions of a white-faced whistling duck with phylogenetic analysis of the virus.

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