Maui’s and Hector’s Dolphin Annual Mortality Rates Taranaki

Maui's and Hector's Dolphins in Taranaki

NZ, North Island, Maui’s and Hector’s Dolphin Annual Mortality Rates 1970 To 2012.

Taranaki from Mokau to Opunake versus the Remaining NZ North Island Coastline.

*2010 - 2012 off Taranaki Coast One Beachcast [Kina Road] And One Netting Death.

Taranaki Maui’s Or Hector’s Annual Sightings From 1970 - 2012.

Mokau to the Maui A Platform and From Pukearuhe to Maui A.

Eleven Taranaki Mortalities And 9 Sightings Predate The Formation Of Doc 1.4.1987.

DOC 2001, Appendix 1,*M01 [Duffy & Williams 2001] reports 15 Taranaki Hector’s or Maui’s stranding's from 1973 to 1989 [* three 1977 entanglement deaths].

However the 2007 fisheries draft consultation document claims nil Taranaki Hector’s or Maui’s strandings from 1921 to 2007; see page 71, Table 2.*M02

The DOC 2007 Incident Data Base [17.3, Appendix C, Pages 120 And 121]*M03 Lists 44 Mortalities From 1921 To 15 March 2007 [*And This Does Not Include Three Taranaki 1977 Entanglement Deaths As Reported In DOC 2001, Appendix 1, + The Waiiti, Taranaki Stranding 26/1/1979, Is Listed At Waiiti, Northland]. Stockin Et Al., 2010 Lists A 10/11/2007 Raglan Stranding [Mother And Unborn Calf]. Four Mortalities [*Two In Taranaki] Are Recorded In The Online DOC July 2008 To July 2012 Incident Reports Giving A Total Of 52 N.Z. North Island Dolphin Mortalities.

With 17 [32.7%] of 52 North Island mortalities in Taranaki [Mokau to Opunake]

The DOC 2012 Maui’s dolphin incident database lists a total of 41 mortalities 1921 to 19 March 2008 [locations and dates not listed]; and there are 4 other mortalities [*two of 4 in Taranaki] recorded in the DOC July 2008 to July 2012 incident reports giving a total of 45 recorded North Island dolphin mortalities.

Assuming the 2012 DOC figure of 45 N.I. mortalities 1921 to July 2012 does not include three 1977 entanglement deaths in Taranaki, a total of 48 recorded N.Z North Island, dolphin mortalities, with 17 [35.41%] in from Mokau to Opunake.

Taranaki Sightings near the Paritutu and Elliot Street New Plymouth outfalls.

Ten [20%] of 50 sightings and four [23.5%] of 17 mortalities 1970-2012 were in-between Fitzroy and Oakura. So the Hector’s and Maui’s dolphin’s habitat included the areas of the historic chemical discharges at Paritutu and Elliot St.

Maui’s Or Hector’s Average Mortalities From 1970 - 2012 *Pukearuhe To *Opunake

*2010 - 2012 off Taranaki Coast One Beachcast [Kina Road] And One Netting Death.

**Tongaporutu 1979 and 1988 and Mokau 1977 And 1979 Included In North Island.

Taranaki Maui’s Or Hector’s Average Sightings By Decade 1970 - 2009 And 2010 – 2012.

Maui’s Or Hector’s Average Sighting Rates From Pukearuhe To The Maui A Platform.

*Duplicate Sightings at Paritutu 2004 Oakura 2004 Port Taranaki 2007 Counted As 1

Draft Data Subject to Recheck

1970-1979 Sightings. 1970 New Plymouth 1970 Pukearuhe 1970 Pukearuhe 1974 Waiiti 1976 Waitara *1976 Pukearuhe *1976 Pukearuhe. [*Doc 2001 29.3.76 & 18.4.76 Sightings]
Mortalities. 1973 Pukearuhe 1974 Oakura 1975 Oakura 1977 Paritutu Seal Rock [Net] 1977 Bell Block [Net] 1977 Mokau [Net] 1979 Onaero 1979 Waiiti 1979 Mokau 1979 Tongaporutu.

1980-1989. Sightings 1980 Mokau 1981 Mokau.

Mortalities 1985 Onaero 1988 Oakura 1988 Tongaporutu 1989 Opunake 1989 Urenui

1990-1999. 1990 Mokau 1990 Mokau E 1996 Mokau 1997 Whitecliffs [Tongaporutu End] 1999 Mokau 1999 Mokau 1999 Mokau.

*1990-1999 Mortalities Nil [*1995 Neonate In Netted Great White Shark Waiwakaiho]

2000-2009. 2001 Maui A Platform 2001 Oakura 2002 Whitecliffs 2003 Rapanui *2004 Oakura *2004 Paritutu Saddleback Sugarloaves [18.1.2004] 2004 North Of Pukearuhe 2004 Waitara 2004 Turangi Rd 2004 Turangi Rd 2004 Rapanui 2005 Waiiti 2005 Mohokatino 2006 Pohokura Platform 2007 New Plymouth Harbour [Jan 07] *2007 Port Taranaki [Feb 07] 2007 Port Taranaki [Photo? 16.2.07] 2008 Pohokura Bravo 2009 Parihaka 2009 Lee Breakwater 2009 Fitzroy 2009 Waiongona River [Filmed] *3 Duplicate Reports = Are Each Counted As 1

*2000-2009 Taranaki Mortalities Nil.

2010-2012. 2010 Mokau 2010 Just Outside Marine Reserve [NP] 2010 Waitara 2011 Mimi 2011 Mokau 2012 Maui A Platform 2012 Waitara 2012 Mohokatino Beach 2012 Rapanui Coast 2012 Mokau 2012 Mokau – Mohokatino [16.2.2012] 2012 Mokau – Mohokatino [25.4.2012]

Mortalities 2012 Kina Rd 2012 Off Coast Highway 45 [Net]

North Island Total Average Mortality Rates Versus Mokau To Opunake Taranaki Rates

Rates From 39 Mortalities 1970 To March 2007, In Doc 2007, 17.3, Appendix C – Doc Incident Data Base And Two 10.11.2007 Stranding’s Both Reported And Sampled In Stockin Et Al., 2010 [10.11.2007 Raglan]. The Total Of 48 Mortalities Also Includes 3 Taranaki Net Deaths From Duffy And Williams [Doc Aerial Survey 2001], Appendix 1 [January 1977 Mokau + January 1977 Bell Block + 2 August 1977 Seal Rock Paritutu] Another 4 Mortalities From 2008 To 2012 Are From The Doc 2012 Incident Database.

Two [January 1977 New Plymouth And 4 August 1977 New Plymouth] Of Three 1977 Taranaki Net Deaths In Duffy And Williams [Doc 2001] Appendix 1, Are Also Listed In The 1978 Report [28] Of The International Whaling Commission, Page 332, In Table 1.

IWC Source ‘The Status Of Hector’s Dolphin In New Zealand Waters’. Baker A.N. 1978.

Three Mortalities Plotted In Doc 2012 On Map 3 Are Excluded As The 2010 Mortality Midway Between Port Waikato And Raglan And 2009 Mortality In The Waiuku Area Are Both Not Reported In The Doc 2009 And 2010 Incident Reports. The 2001 Mortality In The Waiuku Area Is Also Not Reported In Doc 2007, 17.3, Appendix C. The Inclusion Of These 3 Mortalities Would Increase The 2000 To 2009 Rate To 1.8 Mortalities Per Year.

A Maui’s / Hector’s Neonate In A 1995 Taranaki Netted Great White Shark Is Excluded.

Sighting Data Is From The Doc 2012 Data Base And Two Additional 1976 Pukearuhe Sightings [29.3.1976 And 18.4.1976] From Duffy And Williams Doc 2001, Appendix 1.

Original Source