Biological parameters of franciscana dolphins, Pontoporia blainvillei, by-caught in artisanal fisheries off southern Buenos Aires, Argentina

2014 ◽  
Vol 96 (4) ◽  
pp. 821-829 ◽  
Author(s):  
María Fernanda Negri ◽  
María Victoria Panebianco ◽  
Pablo Denuncio ◽  
María Natalia Paso Viola ◽  
Diego Rodríguez ◽  
...  
Keyword(s):  
Body Condition ◽  
Buenos Aires ◽  
The Body ◽  
Artisanal Fisheries ◽  
Buenos Aires Province ◽  
Biological Parameters ◽  
Western Atlantic ◽  
Pontoporia Blainvillei ◽  
The Impact ◽  
Franciscana Dolphin

The franciscana dolphin (Pontoporia blainvillei) is a small coastal dolphin endemic to the south-western Atlantic Ocean. Incidental captures in fishing gillnets is possibly the greatest conservation concern for this species, and occurs within most of its geographical distribution. The aim of this paper is to determine the biological parameters of franciscana dolphin by-caught from artisanal coastal fisheries of the southern Buenos Aires province, Argentina. Between 2003 and 2009, carcasses of 54 incidentally captured franciscanas were collected. The age, sexual and physical maturity and body condition of each specimen was determined. The sex-ratio of the by-caught dolphins did not differ from parity and, consistent with other areas, juveniles younger than 4 yr old were captured in higher proportion (69%). In addition, 74% of the entangled animals were sexually immature and 85% physically immature. Sexually immature dolphins were predominant in the spring, a period which coincides with the breeding season. An assessment of the body condition of captured franciscanas suggests that entanglements were not associated with a disease or physiological disorder. The results presented here are important to assess the impact of artisanal fisheries on the population of franciscana dolphins in the southernmost area of its distribution.

scholarly journals Bycatch of franciscana dolphins Pontoporia blainvillei and the dynamic of artisanal fisheries in the species' southernmost area of distribution

2012 ◽  
Vol 60 (2) ◽  
pp. 149-158 ◽  
Author(s):  
María Fernanda Negri ◽  
Pablo Denuncio ◽  
María Victoria Panebianco ◽  
Humberto Luis Cappozzo
Keyword(s):  
Buenos Aires ◽  
Species Abundance ◽  
Buenos Aires Province ◽  
Northern Coast ◽  
Fishing Vessels ◽  
Pontoporia Blainvillei ◽  
Near Future ◽  
Mortality Estimates ◽  
Incidental Mortality ◽  
Franciscana Dolphin

In Argentina, the franciscana dolphin is one of the most vulnerable cetaceans regularly entangled in coastal artisanal fishery nets. The aim of this paper is to estimate the species' incidental mortality on the Southern coast of Buenos Aires province through interviews with the captains of artisanal fishing vessels, in the period 2006-2009. Franciscana bycatch was reported for gillnets and shrimper gear all year round but it occurred more frequently between October and February, at 5 km offshore and 10-20 m depth. The estimated mean annual incidental mortality was 107 dolphins (CI 95% = 87-129), 92 caught in gillnets (CI 95% = 73-112) and 15 in shrimpers' gear (CI 95% = 8-25) with a capture per unit effort of 0.029 dolphins per km of gillnet (CI 95% = 0.023-0.036) and 0.022 per shrimpe r's net (CI 95% = 0.012-0.035). Annual fluctuations were due to differences in the number of gillnetting fishing days. If mortality estimates for the Northern coast are also taken into account, values attain a maximum of 360-539 dolphins bycaught in the entire Buenos Aires province, representing 2.5-3.7% of the species' abundance in Argentina. This will inevitably lead to the decline of franciscana dolphin populations in the near future unless alternative fishing grounds are identified and alternative gearadopted.

Half a century of sightings data of southern right whales in Mar del Plata (Buenos Aires, Argentina)

2019 ◽  
Vol 100 (1) ◽  
pp. 165-171
Author(s):  
Maria A. Mandiola ◽  
Gisela Giardino ◽  
Julián Bastida ◽  
Sergio Morón ◽  
Diego H. Rodríguez ◽  
...  
Keyword(s):  
Buenos Aires ◽  
Buenos Aires Province ◽  
Western Atlantic ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Coastal Marine ◽  
Past Half Century ◽  
Southern Right Whales ◽  
Inshore Waters

AbstractIn South-western Atlantic waters, individuals of the southern right whale (SRW) Eubalaena australis spend part of the year (the austral winter and spring) in northern inshore waters where they breed and then migrate to southern feeding grounds during the summer. Mar del Plata (MDP) is located between two main reproductive areas (Península Valdés-Argentina and Santa Catarina-Brazil). The purpose of the present study is to report the presence of SRWs on their journey off the coast of MDP based on sighting records during the past half century. We carried out whale observations through systematic weekly coastal marine mammal surveys in different points of the MDP area from 1966 to 2016. The first SRW sighting was recorded in 1970; since then, sighting frequency has gradually increased, reaching a peak of 28 sightings (N = 63 whales) in 2016. These are unique long-term sighting records of SRWs in Argentina and the first on their journey off the shores of Buenos Aires province. We expect that these results will help local authorities to regulate tourism and other activities in the area and thereby contribute to the conservation of the species.

scholarly journals Relationship between body weight and leptin concentrations in mink dams and the birth parameters of kits

2016 ◽  
Vol 72 (12) ◽  
pp. 755-759 ◽  
Author(s):  
Monika Bryl ◽  
Hanna Bis-Wencel ◽  
Brygida Ślaska ◽  
Bożena Nowakowicz-Dębek ◽  
Zbigniew Bełkot ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Condition ◽  
Scoring System ◽  
The Body ◽  
The Other ◽  
Blood Samples ◽  
Serum Leptin ◽  
Significant Difference ◽  
Analysis Of Results ◽  
The Impact

The aim of this study was to assess the impact of the leptin concentration and body weight of mink females on the birth parameters of their kits. Blood samples were collected 3 times during preparation for reproduction, 7±2 days before mating. Total leptin concentration in serum was measured using commercial RIA kits (Millipore, St. Charles, Missouri USA). Research was conducted on 20 clinically healthy scanbrown female minks (Neovison Vison) aged 2-3 years. To evaluate their body condition, the females were divided into two groups based on the BCS scoring system. In the first group, referred to as BCS 2, lean females were included, and the second group (BCS 4) consisted of obese females. In mink dams belonging to BCS 2, the average leptin values were one-fourth of those in the BCS 4 group. The results obtained indicate the influence of the body mass of minks during preparation for reproduction on serum leptin concentration. The results of the Mann-Whitney U test showed a statistically significant difference between weights and leptin concentrations in groups BCS 2 and BCS 4. Among the other traits, such differences were not found. The analysis of results obtained in the two mink groups did not reveal a clear relationship between leptin in the serum of mothers before mating and the birth parameters of their kits.

Heart rate as an indicator of oxygen consumption: influence of body condition in the king penguin

2001 ◽  
Vol 204 (12) ◽  
pp. 2133-2144 ◽  
Author(s):  
G. Froget ◽  
P. J. Butler ◽  
Y. Handrich ◽  
A. J. Woakes
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Body Condition ◽  
Active Oxygen ◽  
The Body ◽  
Regression Equations ◽  
Oxygen Pulse ◽  
Rate Of Oxygen Consumption ◽  
The Impact ◽  
The Relationship

SUMMARY The use of heart rate to estimate field metabolic rate has become a more widely used technique. However, this method also has some limitations, among which is the possible impact that several variables such as sex, body condition (i.e. body fat stores) and/or inactivity might have on the relationship between heart rate and rate of oxygen consumption. In the present study, we investigate the extent to which body condition can affect the use of heart rate as an indicator of the rate of oxygen consumption. Twenty-two breeding king penguins (Aptenodytes patagonicus) were exercised on a variable-speed treadmill. These birds were allocated to four groups according to their sex and whether or not they had been fasting. Linear regression equations were used to describe the relationship between heart rate and the rate of oxygen consumption for each group. There were significant differences between the regression equations for the four groups. Good relationships were obtained between resting and active oxygen pulses and an index of the body condition of the birds. Validation experiments on six courting king penguins showed that the use of a combination of resting oxygen pulse and active oxygen pulse gave the best estimate of the rate of oxygen consumption V̇O2. The mean percentage error between predicted and measured V̇O2 was only +0.81% for the six birds. We conclude that heart rate can be used to estimate rate of oxygen consumption in free-ranging king penguins even over a small time scale (30min). However, (i) the type of activity of the bird must be known and (ii) the body condition of the bird must be accurately determined. More investigations on the impact of fasting and/or inactivity on this relationship are required to refine these estimates further.

scholarly journals Impact of body condition on postpartum features in morada nova sheep

2016 ◽  
Vol 37 (3) ◽  
pp. 1581
Author(s):  
Felipe Brener Bezerra de Oliveira ◽  
César Carneiro Linhares Fernandes ◽  
Aline Maia Silva ◽  
Cleidson Manoel Gomes Silva ◽  
Luiz Fernando De Souza Rodrigues ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Body Condition ◽  
Body Condition Score ◽  
White Blood Cells ◽  
Subcutaneous Fat ◽  
Milk Composition ◽  
The Body ◽  
Fat Reserves ◽  
Condition Score ◽  
The Impact

This study evaluated the impact of nutritional status of Morada Nova sheep at lambing on the reproductive and productive performance and on the survival of lambs in early weaning system. Nineteen, Morada Nova sheep were assigned to two groups according to body condition score (BCS) at lambing: low BCS (n = 11) and high BCS (n=8) with body condition respectively of (mean ± SD) 2.0 ± 0.3 e 2.9 ± 0.1. From birth until lamb weaning (45 days), sheep were weighed weekly and checked the BCS, loin subcutaneous fat thickness, loin depth, hematological profile, milk composition and production, and every three days, we measured the uterine diameter. Lamb weightings were performed up to one week after weaning (52 days). The lower availability of muscle and fat reserves in the low BCS group negatively affected milk production and consequently performance of suckling lambs. However, the results indicated that the uterine involution process, the reproductive parameters including prolificacy, rate of multiple births, number of white blood cells, milk quality, body weight of lambs at birth and mortality rates were not affected by the body condition. The results allowed to describe the responsiveness to opposite nutritional status of Morada Nova sheep, showing their characteristics of adaptation.

Intra-specific isotope variations of franciscana dolphin Pontoporia blainvillei regarding biological parameters and distinct environments

2017 ◽  
Vol 85 ◽  
pp. 47-54
Author(s):  
María Natalia Paso Viola ◽  
Luciana Riccialdelli ◽  
María Fernanda Negri ◽  
María Victoria Panebianco ◽  
Hector Osvaldo Panarello ◽  
...  
Keyword(s):  
Biological Parameters ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

Deformed wing virus type a and b in managed honeybee colonies of Argentina

2020 ◽  
Vol 111 (1) ◽  
pp. 100-110 ◽  
Author(s):  
C. Brasesco ◽  
S. Quintana ◽  
V. Di Gerónimo ◽  
M. L. Genchi García ◽  
G. Sguazza ◽  
...  
Keyword(s):  
Buenos Aires ◽  
Buenos Aires Province ◽  
Virus Species ◽  
Santa Fe ◽  
Deformed Wing Virus ◽  
Future Studies ◽  
Rio Negro ◽  
High Prevalence ◽  
Pcr Products ◽  
The Impact

AbstractApis mellifera is infected by more than 24 virus species worldwide, mainly positive-sense, single-stranded RNA viruses of the Dicistroviridae and Iflaviridae families. Among the viruses that infect honey bees, Deformed wing virus is the most prevalent and is present as three master variants DWV-A, B, and C. Given that the ectoparasitic mite Varroa destructor vectors these virus variants, recombination events between them are expected, and variants and their recombinants can co-exist in mites and honeybees at the same time. In this study, we detect, through RT-qPCR, the presence of DWV-A and B in the same samples of adult bees from colonies of Argentina. Total RNA was extracted from pools of ten adult bees from 45 apiaries distributed across the main beekeeping Provinces of Argentina (Buenos Aires, Santa Fe, Córdoba, Santiago del Estero, Río Negro, and Mendoza); then RT-qPCR reactions were performed to detect DWV-A and B, with specific primer pairs. After the amplifications, PCR products (204 and 660 bp amplicons for DWV-B, and ~250 bp for DWV-A) were purified and sequenced to verify that they corresponded to reported sequences, analyzing them using the Blast software. Of the 45 samples analyzed by RT-qPCR, over 90% were infected with DWV-A and 47% were also positive for DWV-B, where it was found in high prevalence specifically in colonies of A. mellifera of the Buenos Aires Province. Future studies will determine the impact of this type of the virus and its ability to recombine with the other DWV types in the apiaries of our country.

scholarly journals Diet composition of franciscana dolphin Pontoporia blainvillei from southern Buenos Aires, Argentina and its interaction with fisheries

2014 ◽  
Vol 49 (2) ◽  
pp. 393-400 ◽  
Author(s):  
María Natalia Paso-Viola ◽  
Pablo Denuncio ◽  
María Fernanda Negri ◽  
Diego Rodríguez ◽  
Ricardo Bastida ◽  
...  
Keyword(s):  
Diet Composition ◽  
Buenos Aires ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

Quality of preimplantation embryos recovered in vivo from dairy cows in relation to their body condition

Zygote ◽  
2015 ◽  
Vol 24 (3) ◽  
pp. 378-388 ◽  
Author(s):  
A.V. Makarevich ◽  
L. Stádník ◽  
E. Kubovičová ◽  
Z. Hegedüšová ◽  
R. Holásek ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Body Condition ◽  
Body Condition Score ◽  
The Body ◽  
Preimplantation Embryos ◽  
Dead Cell ◽  
Cell Numbers ◽  
The Impact

SummaryThis study examined the impact of cow body condition on the quality of bovine preimplantation embryos. The embryos (n = 107) were flushed from dairy cows and classified according to a five-point scale body condition score (BCS2 n = 17; BCS3 n = 31; BCS4 n = 11) on the 7th day after insemination and then analyzed for development, dead cell index (DCI), cell number and actin cytoskeleton quality. The highest embryo recovery rate (P < 0.05) was recorded in the BCS3 group and the lowest in the BCS4 group. More transferable (morula, blastocyst) embryos were obtained from the BCS4 cows (79%), compared with the BCS2 (64%) or BCS3 (63%) animals. However, cell numbers were higher in the BCS2 and BCS3 groups (P < 0.05) compared with the BCS4 embryos. Conversely, the DCI was lowest in the BCS2 (3.88%; P < 0.05) and highest in the BCS4 (6.56%) embryos. The proportion of embryos with the best actin quality (grade I) was higher in the BCS2 and BCS3 cows compared with the BCS4 group. Almost 25% of all embryos showed fragmented morphology and a higher DCI (5.65%) than normal morulas (1.76%). More fragmented embryos were revealed in the BCS2 (28.6%) and BCS4 (31.25%) groups, and less (19.15%) in the BCS3 group. The cell numbers in such embryos were lower in the BCS4 (22.57) than in the BCS2 (46.25) or BCS3 (42.4) groups. In conclusion, the body condition of dairy cows affects the quality of preimplantation embryos. A BCS over 3.0 resulted in a higher incidence of poor (fragmented) embryos.

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