scholarly journals New biological data for Salaria fluviatilis (Asso, 1801) (Blenniidae) from North of Algeria

2020 ◽  
pp. 89-100
Author(s):  
Djamel Amalou ◽  
Djamila Ider ◽  
Zouhir Ramdane ◽  
Riadh Moulaï
Keyword(s):  
Fish Species ◽  
Growth Parameters ◽  
Physiological Activity ◽  
Biological Data ◽  
Growth Potential ◽  
Hepatosomatic Index ◽  
Breeding Period ◽  
Positive Allometry ◽  
Biological Studies ◽  
The Family

The family Blenniidae inhabiting freshwater systems has been scarcely studied, particularly in North Africa. The present study focused on the biology of Salaria fluviatilis (Asso, 1801) from Kabylie region (northern Algeria). A total of 198 specimens were sampled from May 2015 to May 2016. The total length of this fish varied between 4.9 and 12.7 cm and its total weight varied between 1.2 and 23.7 g. The age of this fish species varied between 1 and 3 years. The sex ratio of S. fluviatilis was in balance (SR = 0.98). The results of our investigation of length-weight relationship show highly significant correlation (p > 0.001); the correlation coefficient r varied between 0.966 and 0.985. The specimens of this fish species exhibited positive allometry in males (b = 3.195) and negative allometry in females (b = 2.782). Growth parameters were higher in males than in females, except for the growth rate (K) where the values were close. The growth performance index (Φ) was similar in both sexes, which confirms the same growth potential for males and females. In Kabylie region, the breeding period of S. fluviatilis occurred between April and July. Our results of analysis of the hepatosomatic index (HSI) and Fulton’s K show that liver energy reserves are not devoted for reproduction; however, muscle reserves seem to support this physiological activity. In perspective, more biological studies must be carried out on this rare and poorly studied fish.

Circumstantial evidence of effect of trout farming on length-weight relations of native fish species: Barbus oligolepis (Battalgil, 1941) and Squalius cii (Richardson, 1857)

2020 ◽  
Vol 9 (3) ◽  
pp. 87-90
Author(s):  
elin Ertürk Gürkan
Keyword(s):  
Fish Species ◽  
Growth Parameters ◽  
B Value ◽  
Native Fish ◽  
Growth Type ◽  
Positive Allometry ◽  
Fish Samples ◽  
Extra Food ◽  
One Year ◽  
And Control

This study was carried out to reveal how the aquaculture activities, located near the stream bed, effect the length-weight relations of native freshwater fish. Fish samples were collected on monthly for one year on the Kocabaş Stream (Çanakkale), a trout farm constructed next to stream. Fish specimens were collected from up and down sections of the trout farm and control station selected from another branch of the stream by electrofishing between August 2015-July 2016. The growth type sign; b value in length-weight relationship indicates that both species are in positive allometry at the down station and isometric growth at the upper station. Fish farm might affect the growth type of both species positively due to contribution of extra food resources originated from the farm via discharge of waste water of trout farm at the down section. However, this hypothesis should be tested by proper growth parameters of the fish species.

scholarly journals Age, growth and mortality of the striped seabream Lithognathus mormyrus (Linnaeus, 1758) in the Gulf of Tunis (Central Mediterranean Sea)

2021 ◽  
pp. 1-9
Author(s):  
Asma Khaldi ◽  
Ines Chater ◽  
Romain Elleboode ◽  
Kélig Mahé ◽  
Nadia Chakroun-Marzouk
Keyword(s):  
Growth Parameters ◽  
Somatic Growth ◽  
Biological Data ◽  
Artisanal Fishing ◽  
Central Mediterranean ◽  
Positive Allometry ◽  
Gulf Of Tunis ◽  
Exploitation Rate ◽  
Marginal Increment ◽  
Lithognathus Mormyrus

Abstract Despite the high commercial value of the striped seabream Lithognathus mormyrus (Linnaeus, 1758) in the Gulf of Tunis, biological data on its age, growth and exploitation rate are lacking. With the aim of estimating growth parameters, 516 individuals, ranging from 6–27.5 cm total length and from 3.5–293.5 g total weight, were collected from the artisanal fishing fleet between February 2014 and July 2016. The somatic growth presented a positive allometry and was described by the equation TW = 6.54 10−3TL3.213. The monthly analysis of the marginal increment of the otoliths revealed that only one annulus was deposited per year. The estimated von Bertalanffy growth parameters were: L∞ = 30.18 cm, k = 0.303 year−1 and t0 = −1.42 years. Total and natural instantaneous rates of mortality were respectively Z = 0.784 year−1 and M = 0.698 year−1. Exploitation rate (E = 0.1) showed that the Gulf of Tunis stock of L. mormyrus is not overexploited. The estimated length class giving highest yield (Lopt) was 17.15 ± 1.71 cm.

scholarly journals On the management of single fish species of hilsa shad (Tenualosa ilisha) resources of Bangladesh

2019 ◽  
Vol 47 (1) ◽  
pp. 173-183
Author(s):  
M Nath Sarker ◽  
M Niamul Naser ◽  
Md Sharif Uddin ◽  
N Nanda Das ◽  
Md Humayun
Keyword(s):  
Fish Species ◽  
Growth Parameters ◽  
Growth Function ◽  
Fishing Effort ◽  
Age And Growth ◽  
Fish Production ◽  
Migratory Fish ◽  
The Family ◽  
Total Fish ◽  
Tenualosa Ilisha

Hilsa shad (Tenualosa ilisha) belonging to the family Clupeidae is a diadromous migratory fish species. It is an important fish in the countries bordering to the Bay of Bengal. Bangladesh harvest about 60% of world hilsa catch. Hilsa contributed12.9% of the country’s total fish production in 2017-2018 with an estimated annual production of 517,198 tons, which was 1.0% to the GDP to support livelihoods of 1.2 million hilsa fishers of Bangladesh. In spite of the importance, there was an alarming situation in hilsa production, where over fishing of hilsa with a result of decline in inland production were observed. In the present study age and growth parameters L=57.7 cm total length and growth rate K=0.90 per year were calculated using VBGF growth function. Population parameters Z=4.90 were calculated using length converted catch curve, M (at water temperature 27°C) =1.45 using Pauly’s formula, F=1.09 and E=70 were estimated. Results indicates both recruitment overfishing and growth over fishing occur through indiscriminate fishing of juvenile hilsa (Jatka) as wel as brood hilsa(mother). Fishing effort has to be reduced at any cost and the affected fishers should be rehabilitated in a proper manner for obtaining the sustainable production of hilsa resources. Bangladesh J. Zool. 47(1): 173-183, 2019

scholarly journals Specific richness, size classes and growth parameters of the main fish species in the upper Mouhoun River basin in Burkina Faso

2021 ◽  
Vol 9 (1) ◽  
pp. 195-203
Author(s):  
Compaore Inoussa ◽  
Sanogo Souleymane ◽  
Tankoano Boalidioa ◽  
Tama Kouakou ◽  
Nacro B Hassan ◽  
...  
Keyword(s):  
Burkina Faso ◽  
River Basin ◽  
Fish Species ◽  
Growth Parameters ◽  
Size Classes

Terrestrial Environments

2020 ◽  
pp. 359-388
Author(s):  
Spyros Sfenthourakis ◽  
Alan A. Myers ◽  
Stefano Taiti ◽  
James K. Lowry
Keyword(s):  
Morphological Characters ◽  
Tectonic Activity ◽  
Model Organisms ◽  
Aquatic Life ◽  
Terrestrial Isopods ◽  
Biological Studies ◽  
The Family ◽  
Terrestrial Environments ◽  
Forest Leaf Litter ◽  
Almost All

Among crustaceans, only Amphipoda, Isopoda, and Decapoda have invaded truly terrestrial environments, but only two groups show full adaptations to live on land: the family Talitridae among the Amphipoda and the suborder Oniscidea among the Isopoda. The Talitridae occur primarily in forest leaf litter, but a number of other habitats, including caves, are recorded. Talitrids are important ecological contributors to the litter fauna, often occurring in high densities. Their adaptations to a terrestrial way of life include the retention of the mitten-shaped second gnathopods, a neotenic condition among males; the first article of antenna 2 greatly enlarged and fixed to the side of the head; and enlarged gills and pleopods often reduced, sometimes to vestigial stumps. Talitrids have a skewed world distribution being at their most diverse in New Zealand, Tasmania, and Japan/Taiwan. They occur in the Caribbean and Central America but are absent from South and North America except as introduced taxa. Their distribution is largely a result of tectonic activity during the past 150 million years and of extinctions during the Tertiary due to increasing aridity of the climate. The Oniscidea (terrestrial isopods) are the only crustaceans that have managed to adapt to almost all habitat types on land and have become the most species-rich suborder of Isopoda. Although monophyly of the Oniscidea is generally accepted, current taxonomy, based almost entirely on morphological characters, needs extensive revision. Terrestrial isopods present a number of unique adaptations to life on land, some of which result from what can be considered as pre-adaptations of ancestral marine isopods, such as egg development in a marsupium, being dorso-ventrally oblate and having a pleopodal respiration. Other crucial adaptations of Oniscidea include the water-conducting system, the structure of their cuticle, and the “covered” type of pleopodal lungs, all of which are responses to the acute problem of desiccation. They are also among the most speciose taxa in caves, some species have even returned to an aquatic life, and a few species have evolved social behavior. Oniscidea are increasingly being used in biogeographical, phylogeographical, ecological, and evolutionary research and can become model organisms for a broad range of biological studies.

scholarly journals Graph cutting and its application to biological data

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 468-479
Author(s):  
Mária Ždímalová ◽  
Ján Major ◽  
Martin Kopáni
Keyword(s):  
Graph Theory ◽  
Biological Data ◽  
Biomedical Data ◽  
Mathematical Approach ◽  
The Family ◽  
The Brain

Abstract In this paper we introduce the concept of segmentation based on mathematical approach using graph theory algorithms using the family of augmenting paths algorithms. We present a new program, an implementation, algorithms and obtained results devoted to segmentation of biomedical data. We implement our program for handling with segmentation, counting a measure of the existence of the minerals in the biomedical data. As a consequence we prove the existence of minerals in the data obtained from the brain of rabbits.

scholarly journals Cell Kinetics in Human Acute Lymphoblastic Leukemia: Computer Simulation With Discrete Modeling Techniques

Blood ◽  
1973 ◽  
Vol 41 (1) ◽  
pp. 141-154 ◽  
Author(s):  
Alvin M. Mauer ◽  
Carl F. Evert ◽  
Beatrice C. Lampkin ◽  
Nancy B. McWilliams
Keyword(s):  
Acute Lymphoblastic Leukemia ◽  
Single Cell ◽  
Cell Kinetics ◽  
Lymphoblastic Leukemia ◽  
Biological Data ◽  
Discrete Modeling ◽  
Proliferative Phase ◽  
Biological Studies ◽  
Modeling Techniques ◽  
Human Acute Lymphoblastic Leukemia

Abstract A model for cell kinetics of human acute lymphoblastic leukemia has been constructed with discrete modeling techniques for computer use with the GPSS/360 computer language. The model has produced results corresponding to observed biological data. It has been possible to explore mechanisms for control of the growth of the leukemic cell population. In addition to the flow of cells from the resting to the proliferative phase, two other important parts of the cell life cycle, cell death and the intracellular events after mitosis, were identified as potentially important regulatory mechanisms. Chemotherapeutic drug effects could be simulated, and in the case of vincristine an unsuspected effect was suggested. This effect of vincristine on transformation of the resting cell to an active proliferative phase has been supported by studies of vincristine effect on blast transformation of phytohemagglutinin-stimulated lymphocytes. A single cell was found to take 3½ yr to grow to a population of 1012 cells, a clinically recognizable number. Although this observation cannot be confirmed from biological studies, this time has an interesting correspondence to the peak incidence of acute lymphoblastic leukemia in childhood. It indicates that a mutational event in a single cell could account for the leukemic process in childhood acute leukemia.

scholarly journals Heterochromatin characterization of four fish species of the family Loricariidae (Siluriformes)

Hereditas ◽  
2005 ◽  
Vol 141 (3) ◽  
pp. 237-242 ◽  
Author(s):  
KARINE FREHNER KAVALCO ◽  
RUBENS PAZZA ◽  
LUIZ ANTONIO CARLOS BERTOLLO ◽  
ORLANDO MOREIRA-FILHO
Keyword(s):  
Fish Species ◽  
The Family
Sign in / Sign up

Export Citation Format

Share Document