Search results for " evolution"

New Mediterranean Marine biodiversity records (December, 2013)

2013

M. Bilecenoglu [et al.]

Reproductive features of the deep-water rose shrimp, Parapenaeus longirostris (Crustacea: Penaeidae), in the Strait of Sicily

2010

The deep‑water rose shrimp, Parapenaeus longirostris (Lucas, 1846), is one of the most valuable and heavily exploited demersal species of the Mediterranean bottom trawl fisheries. The basic life traits of this shrimp, in particular its reproductive aspects, are regularly monitored during experimental trawl surveys carried out in the Mediterranean Sea. Gonadic condition and maturity status for estimating the size at onset of sexual maturity are commonly assessed in females, using macroscopic color scales, histologically validated only in a few geographical areas. In this study, histological analyses were performed on rose shrimps collected from a trawl survey carried out in the Strait of Sic…

Lectotipificación de "Cistus laevipes" L. ("Cistaceae")

2013

La información actual sobre Cistus laevipes L., basiónimo de Fumana laevipes (L.) Spach, muestra que tal taxón no se encuentra tipificado. En el presente trabajo se designa como lectótipo el material original contenido en un pliego del herbario UPS-BURSER. The current information on basionyme of Fumana laevipes (L.) Spach, shows that this taxon is not typified. In this paper the original material enclosed in a herbarium sheet at UPS-BURSER is designated as lectotype.

Solving a Bloody Mess: B-Vitamin Independent Metabolic Convergence among Gammaproteobacterial Obligate Endosymbionts from Blood-Feeding Arthropods an…

2015

Endosymbiosis is a common phenomenon in nature, especially between bacteria and insects, whose typically unbalanced diets are usually complemented by their obligate endosymbionts. While much interest and focus has been directed toward phloem-feeders like aphids and mealybugs, blood-feeders such as the Lone star tick (Amblyomma americanum), Glossina flies, and the human body louse (Pediculus humanus corporis) depend on obligate endosymbionts which complement their B-vitamin-deficient diets, and thus are required for growth and survival. Glossiphoniid leeches have also been found to harbor distinct endosymbionts housed in specialized organs. Here, we present the genome of the bacterial endosy…

Evolutionary conflicts in a small mammal : behavioural, physiological and genetic differences between the sexes

2011

Empirical links between natural mortality and recovery in marine fishes

2017

Probability of species recovery is thought to be correlated with specific aspects of organismal life history, such as age at maturity and longevity, and how these affect rates of natural mortality ( M ) and maximum per capita population growth ( r max ). Despite strong theoretical underpinnings, these correlates have been based on predicted rather than realized population trajectories following threat mitigation. Here, we examine the level of empirical support for postulated links between a suite of life-history traits (related to maturity, age, size and growth) and recovery in marine fishes. Following threat mitigation (medium time since cessation of overfishing = 20 years), 71% of 55 tem…

Correlation between body size and longevity : New analysis and data covering six taxonomic classes of vertebrates

2023

Large bodied species are known to live longer than small bodied species. However, it is less clear whether the positive correlation varies across taxa. In this short communication, we combine data entries from literature and databases on body mass and maximum life span for 3722 species covering taxonomic Classes Chondrichthyes, Teleostei, Amphibia, Reptilia, Aves, and Mammalia. We then analyse the log(maximum life span) – log(body mass) relationship using generalized linear model with nested random intercepts and slopes for Class/Order/Family. Our analyses generally demonstrate the positive longevity – body mass relationship but also reveal that slopes and intercepts differ slightly among a…

Three rare lignicolous fungi from Sicily (S Italy)

2013

<em>Sarcodontia crocea</em> (Schwein.) Kotl., <em>Oligoporus mappa</em> (Overh. & Lowe) Gilbn. & Ryvarden and <em>Inonotus rickii</em> (Pat.) D.A. Reid. are reported for the first time from Sicily (southern Italy). Ecological and distributive features on the three relevant species are also here provided.

Thinking about industry decline : A qualitative meta-analysis and future research directions

2018

We analyze historical and longitudinal research focusing on industry decline. Our analysis suggests that the literature’s general reliance on a few meta-theoretical arguments has important consequences for how decline is framed and explained. We identify four meta-theoretical clusters in the literature: politics and market dynamics are seen as exogenous factors with deterministic features, whereas technology and management capabilities are framed as firm-internal failures with causally questionable explanations of how firm-level characteristics explain industry-level decline. We propose that it is important to understand the limitations of distinct meta-theoretical arguments for an enhanced…

Difficulty of getting accurate and precise estimates of population size: The case of the Siberian flying squirrel in Finland

2008

Accurate estimates of population size and distribution are a prerequisite for effective management of populations, but for most species a reliable estimation of the absolute population size is very difficult. In 1998, the Finnish Ministry of Environment set up a working group to plan a national-level survey for estimation and monitoring of the population size of Siberian flying squirrel (Pteromys volans). In 2006, the population size was reported to be 143 000 females. However, evaluation of the magnitude of possible biases was not attempted. Our aim was to test the population size estimate by conducting a resampling study with the methods of the national survey on an eartagged population o…