Age, growth, and mortality of littlehead porgy, Calamus proridens, from southeast Florida coastal waters

2021 ◽  
Author(s):  
Michael L Burton ◽  
Jennifer C Potts ◽  
Ariel J Poholek ◽  
Jordan Page
Keyword(s):  
Coastal Waters ◽  
Southeastern United States ◽  
Fork Length ◽  
Total Mortality ◽  
Point Estimate ◽  
Growth Equation ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Recreational Fisheries ◽  
Von Bertalanffy Growth Equation

Sectioned otoliths were used to age littlehead porgy Calamus proridens (n = 737) from southeastern Florida recreational fisheries. Otolith sections contained easily identifiable annuli and were reliable structures for aging littlehead porgy up to 11 yrs. Opaque zones were deposited from March to June (peaking in April). Littlehead porgy ranged from 1 to 11 yrs and 220 to 385 mm total length (TL). Body size relationships were TL = 1.09 FL + 16.06 (n = 3474, r2 = 0.95), FL = 0.87 TL – 1.15 (n = 3474, r2 = 0.95), W = 4.76 × 10 −5 TL2.80 (n = 6722, r2 = 0.86), and W = 1.2 × 10−4 FL2.71 (n = 3474, r2 = 0.90), where W is total weight (g) and FL is fork length (mm). Growth was not significantly different between two discrete geographic regions of Florida, and the von Bertalanffy growth equation was Lt = 335 (1 − e−0.41 (t + 2.13)) for all areas combined. The point estimate of natural mortality was M = 0.38, while age-specific estimates of M ranged from 0.60 to 0.41 yrs−1 for ages 1–11. Littlehead porgy were fully recruited to the headboat fishery by age-3 and catch curve analysis resulted in an estimate of total mortality Z = 1.08 for ages 3–7+. This study reports first estimates of life history parameters for littlehead porgy from Atlantic waters of the southeastern United States.

scholarly journals Age, growth, and natural mortality of schoolmaster (Lutjanus apodus) from the southeastern United States

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2543 ◽  
Author(s):  
Jennifer C. Potts ◽  
Michael L. Burton ◽  
Amanda R. Myers
Keyword(s):  
United States ◽  
Life History ◽  
Southeastern United States ◽  
Fork Length ◽  
Point Estimate ◽  
Growth Equation ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Von Bertalanffy Growth Equation ◽  
Lutjanus Apodus

Ages of schoolmaster (n= 136) from the southeastern Florida coast from 1981–2015 were determined using sectioned sagittal otoliths. Opaque zones were annular, forming March–July (peaking in May–June). Schoolmaster ranged in age from 1–42 years; the largest fish measured 505 mm total length (TL) and was 19 years old. The oldest fish measured 440 mm TL. Estimated body size relationships for schoolmaster were:W= 9.26 × 10−6TL3.11(n= 256,r2= 0.95);W= 2.13 × 10−5FL2.99(n= 161,r2= 0.95);TL= 1.03FL+ 10.36 (n= 143,r2= 0.99); andFL= 0.96TL− 8.41 (n= 143,r2= 0.99), whereW= whole weight in g,FL= fork length in mm, and TL in mm. The fitted von Bertalanffy growth equation was:Lt= 482 (1 −e−0.12(t+2.79)) (n= 136). Based on published life history relationships, a point estimate of natural mortality for schoolmaster wasM= 0.10, while age-specific estimates ofMranged from 1.57–0.18 for ages 1–42.

scholarly journals Age, growth, mortality and reproductive seasonality of jolthead porgy, Calamus bajonado, from Florida waters

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3774 ◽  
Author(s):  
Michael L. Burton ◽  
Jennifer C. Potts ◽  
Jordan Page ◽  
Ariel Poholek
Keyword(s):  
Fork Length ◽  
Total Mortality ◽  
Point Estimate ◽  
Growth Equation ◽  
Recreational Fisheries ◽  
Reproductive Seasonality ◽  
Type Analysis ◽  
Instantaneous Rate ◽  
Edge Type ◽  
Von Bertalanffy Growth Equation

Ages of jolthead porgy (Calamus bajonado Schneider 1801) (n = 635) from Florida commercial and recreational fisheries from 2008–2016 were determined using sectioned sagittal otoliths. We determined, using edge-type analysis, that opaque zones were annular, forming March–June (peaking in April). Jolthead porgy ranged from 1–13 years, and the largest fish measured 680 mm TL (total length, mm). Body size relationships for jolthead porgy were TL = 1.09FL + 20.44 (n = 622, r2 = 0.99), FL = 0.90 TL –14.26 (n = 622, r2 = 0.99), and W = 1.1 × 10−5 TL3.06 (n = 577), where W is total weight (grams, g) and FL is fork length (mm). The von Bertalanffy growth equation for jolthead porgy was Lt = 737(1 − e−0.14(t+2.02)) (n = 635). Point estimate of natural mortality was M = 0.32, while age-specific estimates of M ranged from 0.58–0.17 y−1 for ages 1–13. Catch curve analysis estimated the instantaneous rate of total mortality Z = 0.70, while instantaneous rate of fishing mortality F was 0.38. Macroscopic staging of female gonads indicated the presence of hydrated oocytes from December–March, and GSI data indicates that peak spawning in females occurs during March. This study presents the first published findings of life history parameters for jolthead porgy from the Atlantic waters off the southeastern United States.

scholarly journals Laju Ekploitasi Lobster Batu Panulirus penicillatus, Olivier, 1791 (Malacostraca : Palinuridae) di Perairan Laut Yogyakarta

2019 ◽  
Vol 22 (2) ◽  
pp. 197
Author(s):  
Irwani Irwani ◽  
Widy Febriansyah ◽  
Agus Sabdono ◽  
Diah Permata Wijayanti
Keyword(s):  
Coastal Waters ◽  
Spiny Lobster ◽  
Economic Value ◽  
Total Mortality ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Exploitation Rate ◽  
Region Data ◽  
Very High ◽  
Special Region

Indonesia is an area that has various types of beaches with different topography and is a region producing one of the lobsters that have a very high economic value. Yogyakarta had three coastal districts that have lobster produce that is Kulonprogo Regency, Bantul Regency and Gunung Kidul Regency. This research aims to know exploitation rate, the growth model of Von Bertalanffy, mortality, length-weight relationship and distribution of carapace length and to know mortality in spiny lobster (Panulirus Pacillatus) in Yogyakarta Special Region. Data were collected at three beaches namely Depok, Congot and Baron coastal waters. Data was analyse used FISAT II software. The distribution of carapace lengths of stone lobster caught during the research ranged from 40,2-102 mm and the results indicated that the dominant lobster was caught with the highest number of catches below the midterm size of 76,3 mm. Total mortality (Z) 4,251, natural mortality (M) 0,708, taking mortality (F) 3,543, and exploitation rate (E) 0,833 so that the mortality due to taking value of spiny lobster is much higher than natural mortality. Indonesia adalah daerah yang mempunyai berbagai jenis pantai dengan topografi yang berbeda–beda serta merupakan  daerah penghasil salah satu lobster yang memiliki nilai ekonomis sangat tinggi. Yogyakarta memiliki tiga Kabupaten wilayah pantai yang memiliki hasil lobster yaitu Kabupaten Kulon Progo, Kabupaten Bantul dan Kabupaten Gunung Kidul. Penelitian ini bertujuan untuk mengetahui tingkat pemanfaatannya, mortalitas, model pertumbuhan von bertalanffy lobster batu (Panulirus penicillatus) di Daerah Istimewa Yogyakarta. Data diperoleh di tiga pesisir yauitu, Pesisr Depok, Congot dan Baron. Pengolahan data dilakukan dengan menggunakan FISAT II. Distribusi ukuran panjang karapas lobster batu yang tertangkap selama penelitian berkisar antara 40,2–102, mm dan hasil  menunjukkan bahwa lobster dominan tertangkap yang jumlah hasil tangkapnya paling banyak dibawah ukuran nilai tengah 76,3 mm. Panjang total lobster memiliki ukuran terpendek 22,1 cm dan terpanjang 83,4 cm. Hasil yang didapatkan laju mortalitas total (Z) 4,251, nilai mortalitas alami (M) 0,708 , mortalitas penangkapan (F) 3,543 dan laju eksploitasinya (E) 0,833 sehingga diketahui nilai mortalitas penangkapan dari lobster batu jauh lebih tinggi dibandingkan mortalitas akibat alami.

scholarly journals Growth and mortality estimates of Sardinella brasiliensis in the southeastern Brazilian Bight

1994 ◽  
Vol 42 (1-2) ◽  
pp. 113-127 ◽  
Author(s):  
Maria Cristina Cergole ◽  
Helio Valentini
Keyword(s):  
Growth Parameters ◽  
Total Mortality ◽  
Entire Period ◽  
Brazilian Coast ◽  
Growth Equation ◽  
Natural Mortality ◽  
Length Data ◽  
The Mean ◽  
The Difference ◽  
Von Bertalanffy Growth Equation

Length frequency analisys were applied for sardine data collected from commercial catches throughout the southeastern Brazilian coast in 1977-1987. Age/length keys were obtained by otolith ring countings and utilized to transform length into age composition. Growth parameters were estimated by the von Bertalanffy growth equation using age and length data for each year and for all the period of investigation. The mean growth parameters for the entire period were estimated as L∞ = 271 mm and K= 0.59 year-1. Instantaneous total mortality (Z) coefficients per year were estimated using catch curves and methods based on the mean length of the fish caught. Total mortality rate for the entire period was obtained through the average of the annual values. Natural mortality (M) was estimated using the Paul/s empirical equation (1980a), and fishing mortality (F) by the difference between total and natural mortality values.The results were Z = 3.6 year-1; M = 0.96 year-1; and F= 2.6 year-1.

scholarly journals Biological Characteristics of European Perch (Perca fluviatilis L., 1758) Inhabiting Lake Ladik (Samsun, Turkey)

2016 ◽  
Vol 74 (4) ◽  
pp. 141-148 ◽  
Author(s):  
Semra Saygin ◽  
Savas Yilmaz ◽  
Okan Yazicioglu ◽  
Nazmi Polat
Keyword(s):  
Standard Length ◽  
Condition Factor ◽  
Fork Length ◽  
Perca Fluviatilis ◽  
Growth Equation ◽  
European Perch ◽  
Total Length ◽  
Length Standard ◽  
Perch Perca Fluviatilis ◽  
Von Bertalanffy Growth Equation

AbstractThe aim of this study was to determine the growth features of European perch (Perca fluviatilis L., 1758) inhabiting Lake Ladik. A total of 858 individuals were caught. The total length and weight ranged from 8.2 to 27.5 cm and from 7.16 to 365.20 g, respectively. The age of the females ranged between 1 and 7 years and the age of the males ranged from 1 to 5 years. The female to male ratio was 1:0.19. The von Bertalanffy growth equation parameters were determined as L∞=41.27 cm, W∞=1251.40 g, K=0.10 (year−1), t0 (year)=−1.98 for all samples. Length-weight relationship was calculated as W=0.0047TL3.358 for all specimens. Length-length relationships (total length-standard length, total length-fork length, standard length-fork length) were highly significant (r2>0.98). The mean condition factor value was obtained as 1.28 for all fish. Condition factor showed statistically significant increase according to length classes.

scholarly journals Age, Growth, and Natural Mortality of Whitebone Porgy, Calamus Leucosteus, From the Southeastern United States

2021 ◽  
Vol 9 (2) ◽  
pp. 22
Author(s):  
Michael L. Burton ◽  
Jennifer C. Potts ◽  
Ariel Poholek ◽  
Jordan Page ◽  
Dalton Knight
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Fork Length ◽  
Northern Region ◽  
Southern Region ◽  
Natural Mortality ◽  
Point Estimates ◽  
Growth Equations ◽  
Mean Size ◽  
Size At Age

Ages of whitebone porgy (Calamus leucosteus) (n = 559) from southeastern U. S. commercial and recreational fisheries from 1975 – 2017 were determined using sectioned otoliths. Opaque zones were annular, forming April – July (peaking in June). Ages ranged from 2 – 19 years, and the largest fish measured 513 mm TL (total length, mm). Body size relationships were: TL = 1.09 FL + 16.07 (n = 469, r2 = 0.97), FL = 0.89 TL – 6.39 (n= 469, r2 = 0.97), W = 2.8 x 10-5 TL2.91 (n = 462), and W = 6.8 x 10-5 FL2.82 (n = 417) where W is total weight (grams, g) and FL is fork length (mm). The von Bertalanffy growth equations were Lt = 365 (1 - e-0.35 (t + 1.37)) (n = 559) for all areas combined, Lt = 365 (1 - e-0.55(t + 0.00)) (n = 185) for fish from North Carolina through Cape Canaveral, Florida, and Lt = 368 (1 - e-0.25 (t + 2.51)) (n = 374) for fish from southeast Florida. Mean size-at-age was significantly different between regions for ages 4 – 9, (92% of total samples). Point estimates of natural mortality were M = 0.22 and M = 0.30 for northern- and southern-region fish, respectively, while age-specific estimates of M were 0.85 – 0.55 y-1 for ages 2– 19 for the northern region and 0.41 – 0.26 (ages 2-14) for southern region fish. This study presents updated life history parameters for whitebone porgy from the Atlantic waters off the southeastern United States.

scholarly journals DINAMIKA POPULASI IKAN GABUS (Channa striata) DI RAWA DANAU PANGGANG, KALIMANTAN SELATAN

2018 ◽  
Vol 14 (1) ◽  
pp. 16
Author(s):  
Dini Sofarini ◽  
Mohammad Mahmudi ◽  
Asus Maizar S. Hertika ◽  
Endang Yuli Herawati
Keyword(s):  
Growth Rate ◽  
Mortality Rate ◽  
Population Dynamic ◽  
Growth Pattern ◽  
Total Mortality ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Fishery Resource ◽  
Exploitation Rate ◽  
Channa Striata

The province of South Kalimantan has the largest peat swamp that is named Danau Panggang Swamp with an area of 5,390.7 Ha. This swamp has ecological, economic and potential functions of a large fishery resource. The purposes of this study are to evaluate the exploitation rate of Snake Head Fish (Channa striata) in Danau Panggang Swamp, by population dynamic analysis using FISAT program of Von Bertalanffy method.  The results showed that the growth pattern of Snake Head Fish (Channa striata) has the tendency to grow negative allometric with 63.4 cm of long infifer (L¥), growth rate (k) 0.15 per year, theoretical age at the time of the fish is equal to 0 (t0) is -1.48257 years. While the natural mortality rate (M) was 0.43, the mortality rate due to catch (F) of 0.69/year and the total mortality rate  (Z) of 1.12/year, and the rate of exploitation value E = 0.62.  These results indicated that the exploitation rate of Head Snake Fish (Channa striata) in Danau Panggang swamp has a tendency to overfishing.

scholarly journals Preliminary Estimates of Age, Growth and Natural Mortality of Margate, Haemulon album, and Black Margate, Anisotremus surinamensis, from the Southeastern United States

Fishes ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 44
Author(s):  
Michael L. Burton ◽  
Jennifer C. Potts ◽  
Andrew D. Ostrowski
Keyword(s):  
United States ◽  
Life History ◽  
Atlantic Coast ◽  
Southeastern United States ◽  
Geographic Region ◽  
Fish Growth ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Life History Parameters ◽  
Growth Equations

Ages of margate, Haemulon album (n = 415) and black margate, Anisotremus surinamensis (n = 130) were determined using sectioned sagittal otoliths collected from the Southeastern United States Atlantic coast from 1979 to 2017. Opaque zones were annular, forming between January and June for both species, with peaks in occurrence of otoliths with opaque margins in April for margate and March for black margate. The observed ages for margate were 0–22 years, and the largest fish measured 807 mm TL (total length). Black margate ranged in age from 3 to 17 years, and the largest fish was 641 mm TL. Weight–length relationships were: margate, ln(W) = 2.88 ln(TL) − 10.44 (n = 1327, r2 = 0.97, MSE = 0.02), where W is total weight (grams, g); black margate, ln(W) = 3.02 ln(TL) − 11.10 (n = 451, r2 = 0.95, MSE = 0.01). Von Bertalanffy growth equations were Lt = 731 (1 − e−0.23(t+0.38)) for margate, and Lt = 544 (1 − e−0.13(t+2.61)) for black margate. After re-estimating black margate growth using a bias-correction procedure to account for the lack of younger fish, growth was described by the equation Lt = 523 (1 − e−0.18(t+0.0001)). Age-invariant estimates of natural mortality were M = 0.19 y−1 and M = 0.23 y−1 for margate and black margate, respectively, while age-varying estimates of M ranged from 2.93 −0.23 y−1 for fish aged 0–22 for margate and 7.20 − 0.19 y−1 for fish aged 0–18 for black margate. This study presents the first documentation of life-history parameters for margate from the Atlantic waters off the Southeastern United States, and the first published estimate of black margate life history parameters from any geographic region.

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